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Home Small Block Heads Small Block Intake Small Block Cranks

This page contains information on Small Blocks.  For casting numbers, scroll down.  To check the number of a specific small block part, click on the page in the menu bar.

Small Block Statistics:

Engine

Years

Bore

Stroke

Main Journal

Rod Journal

Main Caps

262

1975 & 76

3.671

3.10

2.45

2.10

2 bolt

265

1955 & 56

3.750

3.00

2.30

2.00

2 bolt

267

1979 - 81

3.50

3.48

2.45

2.10

2 bolt

283

1957 - 67

3.875

3.00

2.30

2.00

2 bolt

302

1967

4.001

3.00

2.30

2.00

2 bolt

302

1968 - 69

4.001

3.00

2.45

2.10

4 bolt

305

1976 - 90

3.736

3.48

2.45

2.10

2 bolt

307

1968 - 73

3.875

3.25

2.45

2.10

2 bolt

327

1962 - 67

4.001

3.25

2.30

2.00

2 bolt

327

1968 - 69

4.001

3.25

2.45

2.10

2 bolt

350

1967 - 90

4.001

3.48

2.45

2.10

2 & 4 bolt

400

1970 - 72

4.125

3.75

2.65

2.10

4 bolt

400

1973 - 80

4.125

3.75

2.65

2.10

2 bolt

Small Block Chevy Casting Numbers

Casting # Years
made
Size HP levels
used for
Notes
3970010 69 - 79 350 only 145 - 375 2&4-Bolt main caps.
3970014 68 - 79 350 only 200 & 255 2&4-Bolt main caps.
366245 78 - 82 350 only N\A 4-Bolt main
Bowtie High Tin
14011064 82 - 86 350 only N\A 4-Bolt main
Bowtie High Tin
3914678 68 - 79 350, 327 &: 302 210 - 350 2-Bolt main caps.
3858180 64 - 67 327 only 250-375 2-Bolt main caps.
3892657 64 - 67 350, 327 & 302 210-350 2-Bolt main caps.
3782870 62 - 67 327 only 250-375 2-Bolt main caps.
3789935 61 - 66 283 only 230-315 2-Bolt main caps.
3737739 57 - 629 283 only 220-290 2-Bolt main caps.
3951509 70 - 80 400 only 150-265 2&4-Bolt main caps.
3951511 70 - 80 400 only 255 & 265 2&4-Bolt main caps.
330817 70 - 80 400 only 150-180 2-Bolt main caps.
14010207
14010209
80 - 85 350 only 205 & up 2&4-Bolt main caps.
14088548
14093638
14316379
86 - 88 350 only 205 & up 2&4-Bolt main caps.
1 piece rear main seal.
10125327 92 &;amp UP 350 only 300 & up 2-Bolt main caps.
1 piece rear main seal.
LT-1 blocks
14101148 88 &;amp UP 350 only 205 & up 2&4-Bolt main caps.
1 piece rear main seal.
Late model roller non LT1
10051184 86 &;amp UP 350 only N/A 4-Bolt main caps.
1 piece rear main seal.
 

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Last Updated:

12/16/99 01:07 AM