Small Block Chevy

Small Block Engine Data

CID = cubic inch dispacement

Carb
R = Rochester
H = Holley
FI = fuel injection
TBI = throttle body injection

Year

CID

Carb

Comp

HP@ rpm

trq@rpm net

Bore

Stroke

Models/Comment

1955

265

2

8

162 /4400

257 /2200

3.7502

3

pass

1955

265

4

8

180 /4600

260 /2800

3.7502

3

pass

1955

265

4

8

195/ 5000

3.7502

3

Vette

1956

265

2

8

162 /4400

257/ 2200

3.7502

3

pass

1956

265

2

8

170 /4400

257 /2400

3.7502

3

pass

1956

265

4

9.25

205/ 4600

268 /3000

3.7502

3

pass

1956

265

4

9.25

210 /5200

268/ 3000

3.7502

3

Vette

1956

265

8

9.25

225 /5200

270 /3600

3.7502

3

 

1957

265

2

8

162 /4400

257 /2400

3.7502

3

pass

1957

283

2

8.5

185 /4600

275 /4600

3.8752

3

pass

1957

283

4

9.5

220 /4800

300 /4800

3.8752

3

 

1957

283

8

9.5

245 /5000

300 /3800

3.8752

3

 

1957

283

FI

9.5

250/ 5000

305 /3800

3.8752

3

pass

1957

283

4

9.5

270 /6000

285 /4200

3.8752

3

pass

1957

283

FI

10.5

283 /6200

290 /4400

3.8752

3

pass

1958

283

2

8.5

185 /4600

275 /2400

3.8752

3

pass

1958

283

4

9.5

230/ 4800

300 /3000

3.8752

3

 

1958

283

8

9.5

245/ 5000

300/ 3800

3.8752

3

Vette

1958

283

FI

10.5

250 /5000

305 /3800

3.8752

3

 

1958

283

8

10.5

270 /6000

305 /3800

3.8752

3

Vette

1959

283

2

8.5

185 /4600

275 /2400

3.8752

3

pass

1959

283

4

9.5

230 /4800

300 /3000

3.8752

3

pass

1959

283

8

9.5

245 /5000

300 /3800

3.8752

3
 

1959

283

FI

9.5

250 /5000

305 /3800

3.8752

3

 
1959
283
8
9.5
270 /6000
300 /3800
3.8752
3
Vette
1959
283
FI
10.5
290 /6200
290 /4400
3.8752
3
 
1960
283
2
8.5
170 /4200
275 /2200
3.8752
3
pass
1960
283
4
9.5
230 /4800
300 /3000
3.8752
3
 
1960
283
8
9.5
245 /5000
300 /3000
3.8752
3
Vette
1960
283
8
9.5
270 /6000
300 /3600
3.8752
3
Vette
1960
283
FI
11
275/ 5200
305 /3800
3.8752
3
Vette
1960
283
FI
10.5
315 /6200
- -
3.8752
3
Vette
1961
283
2
8.5
170 /4200
275/ 2200
3.8752
3
pass
1961
283
4
8.5
230 /4800
300 /3000
3.8752
3
1961
283
8
9.5
245 /5000
300 /3000
3.8752
3
Vette
1961
283
8
10.5
270 /6000
300 /3600
3.8752
3
Vette
1961
283
FI
9.5
275 /5200
305 /3800
3.8752
3
Vette
1961
283
FI
9.5
315 /6200
3.8752
3
Vette
1962
283
2
8.5
170 /4200
275 /2200
3.8752
3
pass, STD
1962
327
4
10.5
250 /4400
350 /2800
4
3.2502
 
1962
327
4
10.5
300 /5000
360 /3200
4
3.2502
pass
1962
327
4
11.25
340 /6000
4
3.2502
Vette
1962
327
FI
11.25
360 /6000
4
3.2502
Vette
1963
283
R2
8.5
195 /4800
285 /2400
3.8752
3
pass,STD
1963
327
R4
10.5
250 /4400
350 /2800
4
3.2502
1963
327
R4
10.5
250 /4400
210/4400
4
3.2502
Vette
1963
327
R4
10.5
300 /5000
360 /3200
4
3.2502
pass,L74
1963
327
H4
11.25
340 /6000
4
3.2502
Vette
1963
327
FI
11.25
360 /6000
4
3.2502
Vette
1964
283
R2
9.25
195 /4800
285/ 2400
3.8752
3
pass,STD
1964
283
R4
9.25
220 /4800
295 /3200
3.8752
3
Chevelle,L77
1964
327
R4
10.5
250/ 4400
210 /4400
4
3.2502
Vette
1964
327
R4
10.5
250/ 4400
350 /2800
4
3.2502
pass, L30
1964
327
R4
10.5
300 /5000
360 /3200
4
3.2502
pass, L74
1964
327
H4
11.25
365 /5400
4
3.2502
Vette
1964
327
FI
11.25
375 /5800
352 /5000
4
3.2502
Vette
1965
283
R2
9.25
195 /4800
285 /2400
3.8752
3
pass
1965
283
R4
9.25
220 /4800
3.8752
3
pass
1965
327
R4
10.5
250 /4400
350/ 2800
4
3.2502
 
1965
327
R4
10.5
300 5000
360 3200
4
3.2502
 
1965
327
H4
10.5
350 5800
360 3600
4
3.2502
Chevelle
1965
327
H4
11
365 6200
350 4000
4
3.2502
Vette
1965
327
FI
11
375 6200
350 4600
4
3.2502
Vette
1966
283
R2
9.25
195 4800
285 2400
3.8752
3
full size/A/X
1966
283
R4
9.25
220 4800
295 3200
3.8752
3
full size/A/X
1966
327
R4
10.5
250 4800
4
3.2502
Chevelle/X
1966
327
R4
10.5
275 4800
355 3200
4
3.2502
full size
1966
327
R4
10.501
300 5000
360 3200
4
3.2502
Vette
1966
327
H4
11
350 5800
360 3600
4
3.2502
 
1967
283
R2
9.25
195 4800
285 2400
3.8752
3
 
1967
327
R2
9
210 4800
325 3200
4
3.2502
 
1967
327
R4
10.5
275 4800
355 2200
4
3.2502
 
1967
327
R4
10.25
300 5000
360 3400
4
3.2502
 
1967
327
H4
11
350 5800
360 3600
4
3.2502
 
1967
350
R4
10.5
295 4800
380 3200
4
3.48
 
1968
302
H4
11
290 5800
290 4200
4
3 Z/28
 
1968
307
R2
9
200 4600
300 2400
3.8752
3.25
full size/A/X
1968
327
R2
8.75
210 4600
320 2400
4
3.2502
 
1968
327
R4
10
275 4800
355 3200
4
3.2502
 
1968
327
R4
10
300 5000
360 3400
4
3.2502
 
1968
327
H4
11
325 5600
355 3600
4
3.2502
 
1968
327
H4
11
350 5600
360 3600
4
3.2502
 
1968
350
R4
10.25
295 4800
380 3200
4
3.2502
 
1969
302
H4
11
290 5800
290 4200
4
3
 
1969
307
R2
9
200 4600
300 2400
3.8752
3.2502
 
1969
327
R2
9
210 4600
320 2400
4
3.2502
 
1969
327
R2
9
235 4800
325 2800
4
3.2502
 
1969
350
R4
9
255 4800
365 3200
4
3.48
 
1969
350
R4
10.25
300 4800
380 3200
4
3.48
 
1969
350
H4
11
350 5600
380 3600
4
3.48
 
1970
307
R2
9
200 4600
300 2400
3.8752
3.2502
 
1970
350
R2
9
250 4800
345 2800
4
3.48
 
1970
350
R4
10.25
300 4800
380 3200
4
3.48
 
1970
350
H4
11
350 5600
380 3600
4
3.48
 
1970
350
H4
11
370 6000
380 3200
4
3.48
 
1970
400
R2
9
265 4400
400 2400
4.1253
3.7502
 
1971
307
R2
8.5
200 4600
300 2400
3.8752
3.2502
 
1971
350
R2
8.5
245 4800
350 2800
4
3.48
 
1971
350
R4
8.5
270 4800
360 3200
4
3.48
 
1971
350
H4
9
330 5600
360 4000
4
3.48
 
1971
400
R2
8.5
255 4400
390 2400
4.1253
3.7502
 
1972
307
R2
8.5
115 4000
3.8752
3.2502
 
1972
350
R2
8.5
165 4000
280 2400
4
3.48
 
1972
350
R4
8.5
200 4400
300 2800
4
3.48
 
1972
350
H4
9
255 5600
280 4000
4
3.48
 
1972
400
R2
9
170 3800
325 2000
4.1253
3.7502
 
1973
307
R2
8.5
115 4000
3.8752
3.2502
 
1973
350
R2
8.5
145 4000
255 2400
4.001
3.48
 
1973
350
R4
8.5005
175 4000
260 2800
4.001
3.48
 
1973
350
R4
8.5005
190 4400
270 2800
4.001
3.48
 
1973
350
R4
9
245 5200
285 4000
4.001
3.48
 
1973
350
R4
9
250 5200
285 4000
4.001
3.48
 
1973
400
R2
8.5005
150 3200
295 2000
4.1253
3.7502
 
1974
350
R2
8.5005
145 3600
250 2200
4.001
3.48
 
1974
350
R4
8.5005
160 3800
245 2400
4.001
3.48
 
1974
350
R4
8.5005
185 4000
265 2600
4.001
3.48
 
1974
350
R4
8.5005
195 4400
285 2800
4.001
3.48
 
1974
350
R4
9
245 5200
285 4000
4.001
3.48
 
1974
350
R4
9
250 5200
285 4000
4.001
3.48
 
1974
400
R2
8.5005
150 3200
295 2000
4.1253
3.7502
 
1974
400
R4
8.5005
180 3800
290 2400
4.1253
3.7502
 
1975
262
R2
8.5005
110 3500
200 2000
3.671
3.1
 
1975
350
R2
8.5005
145 3800
250 2200
4.001
3.48
 
1975
350
R4
8.5005
155 3800
250 2400
4.001
3.48
 
1975
350
R4
8.5005
165 3800
255 2400
4.001
3.48
 
1975
350
R4
9
205 4800
255 3600
4.001
3.48
 
1975
400
R4
8.5005
175 3600
305 2000
4.1253
3.7502
 
1976
305
R2
8.5005
140 3800
240 2200
3.736
3.48
 
1976
350
R2
8.5005
145 3800
250 2200
4.001
3.48
 
1976
350
R4
8.5005
165 3800
260 2400
4.001
3.48
 
1976
350
R4
8.5005
185 4000
270 2400
4.001
3.48
 
1976
350
R4
9
210 5200
255 3600
4.001
3.48
 
1976
400
R4
8.5005
175 3600
305 2000
4.1253
3.7502
 
1977
305
R2
8.5005
145 3800
245 2400
3.736
3.48
 
1977
350
R4
8.5005
170 3800
270 2400
4.001
3.48
 
1977
350
R4
8.5005
180 4000
270 2400
4.001
3.48
 
1977
350
R4
9
210 5500
255 3600
4.001
3.48
 
1977
400
R4
8.5005
175 3600
305 2000
4.1253
3.7502
M 3500
1978
305
R2
8.5005
135 3800
235 2000
3.736
3.48
 
1978
305
R2
8.5005
145 3800
245 2400
3.736
3.48
 
1978
350
R4
8.2
160 3800
260 2400
4.001
3.48
 
1978
350
R4
8.2
170 3800
270 2400
4.001
3.48
 
1978
350
R4
8.2
175 3800
270 2400
4.001
3.48
 
1978
350
R4
8.2
185 4000
270 2400
4.001
3.48
 
1978
350
R4
9
220 5200
260 3600
4.001
3.48
L82 Vette
1978
400
R4
8.5005
175 3600
305 2000
4.1253
3.7502
M 3500
1979
267
R2
8.2
125 3800
215 2000
3.5002
3.48
L39
1979
305
R2
8.4
130 3200
235 2000
3.736
3.48
 
1979
305
R4
8.4
155 4000
250 2500
3.736
3.48
 
1979
305
R4
8.4
160 4000
250 2600
3.736
3.48
 
1979
350
R4
8.2
165 3800
270 2400
4.001
3.48
 
1979
350
R4
8.2
170 4000
270 2400
4.001
3.48
 
1979
350
R4
8.2
175 4000
270 2400
4.001
3.48
 
1979
350
R4
8.9
195 4000
280 2400
4.001
3.48
 
1979
350
R4
8.9
225 5200
270 3600
4.001
3.48
Vette
1979
400
R4
8.5005
175 3600
305 2000
4.1253
3.7502
M 3500
1980
267
R2
8.3 120
215 2000
3.5002
3.48
L39
1980
305
R4
8.6 155
240 1600
3.736
3.48
 
1980
305
R4
8.5005
180 4200
245 2400
3.736
3.48
 
1980
350
R4
8.2
190 4200
280 4200
4.001
3.48
 
1980
350
R4
9
230 5200
3600
4.001
3.48
 
1980
400
R4
8.5005
175 3600
305 2000
4.1253
3.7502
M 3500
1981
267
R2
8.3
115 4000
200 2400
3.5002
3.48
L39 code i
1981
305
R4
8.6
150 3800
240 2400
3.736
3.48
LG4,code H
1981
305
R4
8.6
165 4000
245 2400
3.736
3.48
 
1981
350
R4
8.2
175 4000
270 2400
4.001
3.48
 
1981
350
R4
8.2
190 4000
270 2400
4.001
3.48
LM1
1982
267
R2
8.3
110 4000
200 2400
3.5002
3.48
L39 code i
1982
305
R4
8.6
145 4000
240 2400
3.736
3.48
LG4,code H
1982
305
TBI
9.5006
165 4200
 
1982
305
TBI
9.5006
165 4200
3.736
3.48
LU5
1982
350
R4
8.2
190 4000
4.001
3.48
LM1
1982
350
TBI
9
200 4200
4.001
3.48
Vette L83
1983
305
R4
8.6
150 3800
240 2400
3.736
3.48
LG4,code H
1983
305
TBI
9.5006
165 4200
3.736
3.48
LU5
1983
350
R4
8.2
190 4000
4.001
3.48
LM1
1984
305
R4
8.6
150 3800
240 2400
3.736
3.48
LG4,code H
1984
305
R4
9.5006
190 4800
3.736
3.48
L69
1984
350
R4
8.2
190 4000
4.001
3.48
LM1
1984
350
TBI
9
205 4300
4.001
3.48
L83
1985
305
R4
8.6
165 4000
240 2400
3.736
3.48
1985
305
R4
9.5006
165 4400
3.736
3.48
 
1985
305
R4
9.5006
180 4800
3.736
3.48
L69
1985
305
TPI
9.5006
190 4800
3.736
3.48
LB9
1985
350
R4
8.2
190 4000
4.001
3.48
LM1
1985
350
R4
8.2
205 4200
290 4200
4.001
3.48
code 6
1985
350
TPI
9
230 4000
4.001
3.48
L98
1986
305
R4
9.5006
165 4400
245 2400
3.736
3.48
code H
1986
305
R4
9.5006
180 4800
3.736
3.48
L69
1986
305
TPI
9.5006
190 4800
3.736
3.48
LB9
1986
350
R4
8.5005
205 4200
290 4200
4.001
3.48
code 6
1986
350
TPI
9
230 4000
4.001
3.48
L98
1987
305
R4
8.6
150 4000
240 2400
3.736
3.48
code H
1987
305
TBI
9.3
150 4000
3.736
3.48
 
1987
305
TPI
9.5006
190 4000
3.736
3.48
LB9
1987
350
R4
8.5005
205 4200
290 4200
4.001
3.48
code 6
1987
350
TPI
9
230 4400
4.001
3.48
L98
1987
350
TPI
9.5006
240 4000
4.001
3.48
L98
1988
305
TBI
9.3
150 4000
3.736
3.48
 
1988
305
TPI
9.5006
190 4000
3.736
3.48
LB9
1988
350
R4
8.5005
205 4200
290 4200
4.001
3.48
code 6
1988
350
TPI
9
230 4400
4.001
3.48
L98
1988
350
TPI
9.5006
245 4300
340 3200
4.001
3.48
L98 code 8/Vette
1989
305
TBI
9.3
165 4000
3.736
3.48
 
1989
305
TBI
9.3
170 4400
255 2400
3.736
3.48
code E
1989
305
TPI
9.5006
190 4000
3.736
3.48
LB9
1989
350
TBI
9.8
195 4200
295 2400
3.736
3.48
code 7
1989
350
TPI
9
230 4400
4.001
3.48
L98
1989
350
TPI
9.5006
240 4000
4.001
3.48
L98
1989
350
TPI
9.5006
245 4000
340 3200
4.001
3.48
L98 code 8/Vette
1990
305
TBI
9.3
170 4400
255 2400
3.736
3.48
code E
1990
305
TPI
9.5006
190 4000
3.736
3.48
LB9
1990
350
TBI
9.3
185 3800
300 2400
4.001
3.48
code 7
1990
350
TPI
9
230 4400
4.001
3.48
L98
1990
350
TPI
9.5006
245 4000
345 3200
4.001
3.48
L98 code 8/Vette
1990
350
TPI
11 375
5800
370 5600
3.897
3.66
ZR1 code J
1991
305
TBI
9.3
170 4200
255 2400
3.736
3.48
code E
1991
305
TPI
9.3
230 4400
300 3200
3.736
3.48
code F
1991
350
TBI
9.3
185 3800
300 2400
4.001
3.48
code 7
1991
350
TPI
9.7506
240 4400
345 3200
4.001
3.48
L98 code 8
1991
350
TPI
10
250 4200
4.001
3.48
L98
1992
305
TBI
9.3
170 4400
255 2400
3.736
3.48
code E
1992
305
TPI
9.3
205 4400
285 3200
3.736
3.48
code F
1992
350
TBI
9.3
195 4200
300 2400
4.001
3.48
code 7
1992
350
TPI
9.7506
240 4400
345 3200
4.001
3.48
L98 code 8
1992
350
TPI
10.501
300 4400
340 4000
4.001
3.48
LT1
1993
305
TBI
9.8
180 4100
255 2400
3.736
3.48
code E
1993
350
TBI
9.8
185 3800
300 2400
4.001
3.48
code 7
1993
350
MFI
10.501
275 5000
325 2400
4.001
3.48
LT1 code P
1993
350
MFI
10.501
300 5000
340 4000
4.001
3.48
LT1 code P
1993
350
TPI
11
375 5800
370 4800
3.9
3.66
ZR1 code J/Vette
1994
350
MFI
10.501
260 4800
330 3200
4.001
3.48
code P
1994
350
MFI
10.501
300 5000
340 4000
4.001
3.48
LT1 code P
1994
350
TPI
11
375 5800
370 4800
3.9
3.66
ZR1 code J/Vette
1995
350
MFI
10
260 4800
330 3200
4.001
3.48
code P
1995
350
MFI
10.401
300 5000
330 4000
4.001
3.48
LT1 code P
1995
350
TPI
11
405 5800
385 5200
3.9
3.66
ZR1 code J/Vette
1996
350
MFI
10
260 4800
330 3200
4.001
3.48
code P
1996
350
MFI
10.4
300 5000
340 4000
4.001
3.48
LT1 code P
1996
350
MFI
10.6
330 5800
340 4500
4.001
3.48
LT1 code 5/Vette

Block Casting Numbers

[ Back to Top ]
[ 140000-3500000] [ 3500000-3800000 ] [ 3800000-3900000 ] [3900000-6000000 ]
[ 6000000-12000000 ] [ 12000000-up ]

CASTING#

SIZE

YEAR

MAIN CAP

NOTES

140029

350

80-84

2

 

330817

400

72-80

2

 

355909

262

75

2

 

355909

305

76-79

2

 

360851

262

75-76

2

Monza V-8

361979

305

78-79

2

 

366245

350

78-79

2

 

366286

 

4

Bowtie, Aluminum, siamesed, straight nodular iron main caps, 2-piece seal, 400-4150" bores, 245" main journals

366287

4

Bowtie, Aluminum, siamesed, straight nodular iron main caps, 2-piece seal, 400-4150" bores, 245" main journals

366299

4

Bowtie, Aluminum, nodular iron splayed caps, wet sump, 400" bore

389257

302

67

2

 

393288

283

65-67

2

 

460703

350

78

4

 

460776

305

78-79

2

 

460777

305

78-79

2

 

460778

305

78-79

2 or 4

some Canadian heavy duty truck blocks have 4-bolt main caps

471511

267

79-82

2

 

3556519

283

58-61

2

 

3703524

265

55

2

No oil filter

3720991

265

56-57

2

 

3731548

265

57

2

No side motor mounts

3731548

283

57

2

No side motor mounts

3737739

283

58-64

2

 

3756519

283

58-62

2

 

3782870

327

62-67

2

 

3789817

283

62-64

2

 

3789817

327

62-67

2

 

3789935

283

61-64

2

 

3790721

283

62-64

2

Chevy II recessed oil filter boss

3790721

327

65-66

2

Chevy II recessed oil filter boss

3791362

327

62-67

2

Chevy II recessed oil filter boss

3792563

327

65

2

 

3792582

283

64-65

2

 

3794226

283

58-63

2

 

3794460

327

62-64

2

 

3814660

327

68-69

2

 

3830944

327

63

2

 

3834810

283

64-66

2

 

3834812

283

62-63

2

 

3837739

283

58-62

2

 

3849852

283

57-66

2

 

3849935

283

65-67

2

 

3858174

327

64-67

2

 

3858180

327

64-67

2

 

3858618

350

68-76

2

 

3862194

283

65-67

2

Chevy II recessed oil filter boss

3862812

283

62-64

2

 

3892657

302

67

2

Z-28 Camaro

3892657

327

67

2

 

3892657

350

67

2

Camaro

3896944

283

67

2

 

3896948

283

66-67

2

 

3903352

327

67

2

 

3914636

307

68

2

 

3914638

327

68

2

Truck

3914653

307

68-73

2

 

3914660

327

68

2

 

3914678

302

68

2

Z-28 Camaro

3914678

327

68

2

 

3914678

350

68

2

 

3932371

307

69-73

2

 

3932373

307

68-73

2

 

3932386

302

69

4

Z-28 Camaro

3932386

327

69

2

 

3932386

350

69

4

 

3932388

350

69

2 or 4

 

3951509

400

70-71

4

 

3951509

400

74-80

2

 

3951511

400

70-73

4

Some replacement blocks had 2-bolt main caps

3956618

302

69

4

Z-28 Camaro

3956618

327

68-69

2

 

3956618

350

69

2 or 4

 

3956632

307

69

2

 

3959512

327

62-67

2

Was also used for some replacement blocks

3970010

302

69

4

Z-28 Camaro

3970010

350

69-80

2 or 4

 

3970014

350

70-76

2 or 4

 

3970020

307

70-73

2

 

3970024

307

69-73

2

 

4715111

305

80

2

 

6259425

350

69-76

2

 

10036033

350

 

4

Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"

10051182

 

2 or 4

Bowtie, 375"-430" bores, 1 or 2-piece rear seal

10051184

 

4

Bowtie, 400"-4155" bores, 1 or 2-piece rear seal

10054727

350

86-up

2 or 4

one piece rear seal, some "Made in Canada"

10066036

350

 

2 or 4

Target Master/Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"

10066038

350

94

4

Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"

10090511

350

90

2

LT-5, ZR1 Vette, 375hp

10125327

350

92-up

2 or 4

GenII LT-1, reverse flow cooling

10125327

350

96-up

2 or 4

GenII LT-4, reverse flow cooling

10134996

 

4

Bowtie, Aluminum, 4125" bore 265" main journals

10153558

350

91-92

4

LT-5, ZR1 Vette, 375hp

10168588

265

94-96

2

L99, GenII, 43 Liter V-8, Caprice, reverse flow cooling

10199001

350

93-95

4

LT-5, ZR1 Vette, 405hp

10243878

305

96-97

2

Vortec truck, roller cam, one-piece rear seal

10243880

350

95-00

2 or 4

GenI crate motors and "ZZ4", roller cam, one piece rear seal

12550592

350

97-up

 

crossbolted block, GenIII, "LS1", aluminum

12559378

350

01-up

crossbolted block, GenIII, "LS1", aluminum

12559846

350

98-up

crossbolted block, GenIII, "LS1", aluminum

12560621

350

98-up

crossbolted block, GenIII, "LS1", aluminum

12562174

350

98-up

crossbolted block, GenIII, "LS1", aluminum

14010201

305

80-85

2

 

14010202

305

80-85

2

 

14010203

305

80-85

2

 

14010207

350

80-85

2 or 4

 

14010209

350

80-85

4

 

14010280

267

79-82

2

 

14011064

350

83

4

 

14011148

350

87-89

 

Roller cam, one-piece rear seal

14016376

267

79-82

2

 

14016379

350

77-79

2 or 4

 

14016381

305

80-84

2

 

14016382

305

79-84

2

 

14016383

305

80-85

2

Truck

14079287

350

86-90

 

Truck

14088526

350

87-89

Roller cam, one-piece rear seal

14088548

350

86-88

2 or 4

 

14088551

305

86-87

2

one-piece rear main seal

14093627

305

87-91

2

Roller cam, one-piece rear seal

14093638

350

87-95

2 or 4

Roller or flat tappet cam one-piece rear seal

14094766

305

86-up

2

One-piece rear seal

14101148

350

87-90

4

One-piece rear seal

14102058

305

87-91

2

Roller cam, one-piece rear seal

22551656

 

4

Rocket block, 400"-4190" bores, 245" main journal sizes, splayed caps, dry sump, 2-piece rear seal, 9025" deck

Head Casting Numbers

[ Back to Top ]
[ 330000-3600000 ] [3600000-3800000 ] [3800000-10000000 ] [ 10000000-12000000 ]
[ 12000000-14000000 ] [14000000-up ]

CASTING#

YEAR

SIZE

NOTES

330545

73

350

76cc chamber, 202/160

333881

74-75

350

76cc chamber, 202/160

333882

74-80

350/400

76cc chambers

340292

70's

Over the counter, angle plug, 64cc chamber

354434

75-79

262/267/305

60cc chambers

358741

76-79

305

 

376445

77-85

350

76cc chamber, small valves

376450

75-81

262/267/305

6 or 7 exhaust bolt holes, 60cc chamber

462614

77-79

305

60cc chamber

462624

75-86

350/400

76cc chamber, 194/15 or 202/16 valves

468642

76-up

350/400

 

471513

79

267/350

 

517513

79

267/350

 

1816887

63

283

Made in "Canada", GMC HD truck

3636839

55

265

 

3703523

55

265

 

3713358

55-56

265

 

3713569

55-56

265

 

3725306

56

265

 

3731539

57

283

283 HP FI

3731544

57-61

283

 

3731554

57-62

283

 

3731556

57

283

Truck, Made in Canada

3731762

56

265

Vette, 2x4 carbs

3737775

62-67

283/327

 

3740997

57

283

1x4, 2x4 & FI (exc-283hp)

3743056

58

283

 

3743096

62-67

327

GMC Truck

3747363

57-61

283

 

3747460

59-67

283/327

70cc chambers

3748770

58

283

 

3748772

58-61

283

 

3755537

57-62

283

 

3755539

58-62

283

 

3755549

57-62

283

 

3755550

59

283

 

3755585

62-67

327

GMC Truck

3767462

62-67

327

 

3767465

59-61

283

 

3767754

59-61

283

60cc chambers

3767792

60-64

283

 

3770126

69

327

 

3774682

60-64

283/327

70cc chambers

3774684

62-64

327

75cc chambers

3774692

58-64

283

60cc chambers

3782461

64-66

327

Camel hump,no accessory holes,160/62cc port volumes,62cc chamber

3782461X

60-63

283/327

Camel hump,no accessory holes,larger 172/64cc port volumes, 62cc chamber

3795896

63-65

283

60cc chamber

3795896

62-64

327

60cc chamber

3798996

63-67

327

 

3814480

60-67

283/327

70cc chambers, 172/15 valves

3814482

62-67

283/327/350

75cc chambers

3817680

63-67

283/327

 

3817681

62-67

327

 

3817682

61-62

283

 

3836839

55

265

 

3836842

57-67

283/327

 

3837064

56-62

265/283

 

3837065

55-56

265

Truck

3848720

57-58

283

 

3876775

60-67

283/327

75cc chamber

3884520

60-67

283

Some marked "Made in Canada", 60cc chamber, also used by Studebaker

3884520

62-67

327

Some marked "Made in Canada", 60cc chamber, also used by Studebaker

3890462

66-67

302/327/350

Camel hump,no accessory holes,64cc chamber

3901068

87-up

350

Crate motor, 285hp, 64cc chamber

3911032

68

307/327

70cc chamber

3912264

58-62

283

 

3912265

63-64

283

 

3912311

65-67

327

 

3912313

65-67

327

 

3917290

67-68

307/327

 

3917291

67-68

302/327/350

Camel hump,no accessory holes,64cc chamber

3917292

68

327/350

Camel hump,64cc chamber

3917293

68

307/327

75cc chambers

3927185

69-76

307/327/350

70cc chambers

3927186

69-70

302/350

Camel hump,64cc chambers,accessory holes

3927187

69-70

350

Camel hump,64cc chambers,accessory holes

3927188

69

327

74cc chambers

3927188

70

307

74cc chambers

3931633

68-73

307

 

3931635

68-76

350

 

3931638

68

327

Truck

3932441

69-70

350

76cc chambers

3932441X

69-70

350/400

80cc chambers

3932454

69-73

307

 

3932454

69-79

350

Truck

3946812

69

350

 

3946813

69-79

350

Truck

3947040

68

327

Right angle casting identifier,64cc chambers, good HP head, used in trucks, no accessory holes

3947041

69-70

302/350

Right angle casting identifier, 64cc chamber, accessory holes, good HP head

3947041X

69-70

302/350

Right angle casting identifier, 64cc chamber , 165cc intake port, accessory holes, good HP head

3951598

70

400

76cc chambers

3964286

350

 

3965742

70

350

over the counter, angle plug

3970126

67-70

327/350

 

3973370

69-70

350

over the counter, 64cc, straight or angle plug

3973414

70

350

LT1-370hp, Camel hump, 64cc chamber

3973487

71-72

350

used on 71-72 350 LT1, 75cc chamber

3973487X

71-72

350

75cc chamber

3973493

71-72

400

76cc chamber

3986316

71

350

76cc chamber

3986336X

350

76cc chamber

3986339

71

307/350

74cc chamber

3986339X

71

307/350

74cc chamber

3986388

68-76

307/350

 

3991492

70

350

LT1,Camel hump,accessory holes,64cc, straight plug

3991492

70-up

over the counter,Camel hump,64cc, straight or angle plug

3998916

72

350

also used w/'72 350 LT1,big valves, screw in studs,76cc chambers

3998920

72-73

350

 

3998991

72-73

307/350

75cc chambers

3998993

72-73

307/350

75cc chambers

3998993

current

350

Goodwrench crate motors,"Hecho en Mexico",75cc chambers

3998997

72-73

350/400

76cc chambers

3998997

78-84

305/350

76cc chambers

4079261

75

350

 

10033867

Aluminum,over the counter Pontiac 23' head,62cc,angle plug, 196cc intake port

10045434

Over the counter Pontiac 15' head 55cc, angle plug, raised runner aluminum, "roll over" head

10051101

Bowtie, aluminum, 55cc, angle plug raised runner, 196cc intake port

10065202

87-95

350

Truck

10065203

87-95

350

Truck

10065204

87-95

350

 

10065205

87-95

305

 

10065206

87-95

350

 

10065207

87-95

305

 

10088113

88-up

350

Aluminum, 58cc, angle plug, raised "D" port exhaust, 194"/15" valves

10093328

Over the counter, Pontiac 15' head aluminum,224cc ports, 61cc chambers, "roll over" head

10106178

90

350

LT5, ZR1, DOHC, 32-valve, pass side, aluminum

10106179

90

350

LT5, ZR1, DOHC, 32-valve, drvs side, aluminum

10110810

91-up

350

Gen 1

10120928

87-95

350

 

10125320

94-96

350

GenII LT1, cast iron version, used on "9C1" Police package, Impala SS, Cadillac Fleetwood, Buick Roadmaster reverse flow cooling

10128374

92-up

350

GenII LT1, 53cc, angle plug, aluminum, reverse flow cooling,

175/68cc ports

 

10134352

Bowtie, 45cc, angle plug, "low" port, 223cc intake port, aluminum, 18' race head

10134363

NOTE: This casting # has been used in many different versions of this aluminum 18' and 15' Bowtie race head Different chamber volumes, port volumes, port locations, valve sizes, etc were used Check this casting carefully to determine which features it may have There are at least 6 different versions as of 11/99

10147898

95-98

350

GenI crate motor

10159550

87-95

350

 

10159551

87-95

305

 

10159552

87-95

350

 

10159553

87-95

305

 

10174389

91-94

350

LT5, ZR1, DOHC, 32-valve, drvs side, aluminum

10174390

91-95

350

LT5, ZR1, DOHC, 32-valve, pass side, aluminum

10185040

Bowtie, aluminum, 45cc chambers, 1st version, symmetrical ports, 263cc intake ports, splayed valves

10185040

Bowtie, aluminum, 45cc chambers, 2nd version, symmetrical ports, 240cc intake ports, splayed valves

10205245

93

350

GenII LT1, aluminum, reverse flow cooling, 175/68cc port volumes

10207643

94-96

350

GenII LT1, aluminum, reverse flow cooling, 175/68cc port volumes

10208890

94-96

265

GenII, L99, 43 Liter V-8, cast iron, reverse flow

10215339

97

350

GenIII, LS1, aluminum, 68cc

10225121

94-95

350

LT5, ZR1, DOHC, 32-valve, drvs side, aluminum

10225122

95

350

LT5, ZR1, DOHC, 32-valve, pass side, aluminum

10239902

96-up

350

GenII LT4, aluminum, reverse flow cooling, 195cc port, 544cc chamber, angle plug

10239906

96-up

350

"Vortec 5700", "L31", 64cc chamber, 170cc intake port, 194"/15" valves

12367712

99-up

"Fast Burn", aluminum, 210cc intake, port, 200/155 valves, 62cc chamber

12367713

99-up

"Fast Burn" used on ZZ430 crate motor, aluminum, 210cc intake port, 200/155 valves, 62cc chamber

12480005

2000

LS1 "GTZ", aluminum, 38cc, 2125"/1625" valves, angle plug

12480011

97-up

Bowtie "SB22", aluminum, 2nd version of "SB2", 48cc chambers, "mirror ports", revised valve angles & plug location

12506450

87-95

350

 

12509859

87-94

305

 

12516852

87-95

350

 

12551561

96

350

GenII, "LT1", aluminum

12552520

97-up

305

Vortec, truck

12554290

94-96

350

GenII, "LT1", cast iron version, used on "9C1" Police package, Impala SS, Cadillac Fleetwood, Buick Roadmaster reverse flow cooling

12555690

96

350

GenII, "LT4", aluminum

12558059

97

305

Vortec, truck, 184"/15" valves, 64cc chamber

12558062

98

350

L31 Vortec, truck, 64cc chambers, 194/15, 170cc intake port

12558806

97-98

350

GenIII, "LS1", aluminum, 68cc

12559853

99

350

GenIII, "LS1", aluminum, 68cc

12564241

01

350

GenIII, "LS1", aluminum, 68cc

14008856

79-81

267

 

14094093

86-88

350

 

14010201

82-85

305

 

14011034

Bowtie, cast iron, 64cc chambers, 184cc port volume, angle plug, "Phase II" head

14011049

Bowtie, aluminum, 55cc chambers, angle plug, 180cc ports, "Phase 6"

14011083

55-86

350

Crate motor for years indicated 285/300hp, 64cc chambers, 194"/15" valves

14014415

80-85

267/305

 

14014416

80-86

305

184"/15" valves, 58cc chambers

14014440

80

305

184"/15" valves

14019821

80-86

350

 

14019924

79-81

267

 

14019926

80-86

350

 

14010516

80-86

350

 

14020517

80

350

 

14020555

81

305

 

14020556

81

350

 

14022056

85

350

 

14022206

80

350

 

14022301

80-86

305

 

14022601

80-86

267/305

184"/15" valves, 58cc chambers

14022801

80-86

305

 

14024816

350

76cc chambers, 194/15 valves, GenI crate motors

14034806

78-82

267

 

14034807

78-86

305

 

14034808

80-86

350

 

14034808

96-up

350

76cc chambers, 194"/15" valves, GenI Goodwrench crate motors

14034810

80-86

350

Truck

14034811

80-86

350

Truck

14039121

81-86

305

Truck

14039122

81-86

305

Truck

14071114

80-86

350

 

14075381

80-86

350

Truck

14079261

86

350

 

14085844

80-86

350

Truck

14085963

86

350

 

14089119

86-88

350

 

14094093

86-88

350

 

14096217

55-86

350

Crate motor, 285hp/300hp, 64cc chambers, 72' or 90' center intake manifold bolt angles

14101081

87-95

305

 

14101083

87-up

350

GenI, also used on crate motors, 285 or 300 hp, 64cc chambers, 72' center manifold bolt angles

14101128

86-87

350

Aluminum, 58cc, angle plug

14102187

87-91

305

184"/15" valves

14102191

87-up

350

 

14102193

87-up

350

 

24502559

96-97

Bowtie, "SB2", 1st version, "mirror ports", aluminum, 196cc port, CNC version 280cc port, 38cc chamber

25500141

Buick/Chevy aluminum 10' head, 42cc chambers, symmetrical ports, 235cc intake port volumes, 21"/1625" valves

33417369

90-up

350

GenI Goodwrench crate motor, "Hecho en Mexico", 76cc

CHEVY "W" MOTOR

348-409 V-8 CASTING NUMBERS

348-409 BLOCKS

CASTING#

SIZE

YEAR

NOTES

3732755

348

59-61

 

3732811

348

58

 

3751872

348

58

 

3755011

348

59-61

 

3771705

348

59-61

 

3782012

348

58-61

 

3788068

409

62-63

 

3795623

409

61

 

3798962

348

62-65

Truck

3815707

348

58-61

 

3830814

427

63

"Z11" (4312" bore x 365" stroke)

3830814

409

63-64

 

3839752

409

62-63

&nbnbsp;

3839754

409

65

 

3844422

409

64-65

 

3857655

348

62-65

Truck

3857656

409

64-65

 

3860386

409

62-64

 

3860387

348

58

 

348-409 HEADS

3732791

348

58-60

 

3758379

348

59-61

250 hp

3759256

348

58

 

3759332

348

58-60

 

3764702

348

60

Truck

3767738

348

59-60

250 hp

3781147

348

60-61

HiPerf, 206"/172" valves

3795586

348/409

61

HiPerf, 206"/172" valves

3814690

409

62-63

HiPerf, 219"/172" valves

3819333

348/409

62-65

HD Truck

3830817

409

63-65

340 hp

3837731

427

63

"Z11" (4312" bore x 365" stroke)

3852583

409

63-65

HiPerf, 219"/172" valves

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