| Small Block |
| CID
|
Block
|
StockBore
|
OverBore
|
Crank
|
Stroke
|
Rod
|
Additional comments
|
| 334 |
305 |
3.766 |
0.030 |
400 |
3.75 |
5.565 or 5.7 |
Crank main journals ground to 305
main size. Must check rod balance pad to piston clearance (underside
of piston cup). Must check rod to cam clearance with 5.7 rods |
| 366 |
350 |
4.000 |
0.030 |
350 |
3.60 |
5.7 or 6.0 |
Offset grind crank to achieve 3.60
stroke. Must check rod balance pad to piston clearance (underside
of piston cup) when using 6.0 rod |
| 377 |
400 |
4.125 |
0.030 |
350 |
3.48 |
5.7 or 6.0 |
Use spacers and 350 mainbearings
or special spacer bearings |
| 383 |
350 |
4.000 |
0.030 |
400 |
3.75 |
5.565, 5.7, 6.0 |
Turn crank main journals to 350 main size or use
custom 383 crank.
Rod to cam clearance must be checked with 5.7 or 6.0 rod |
| 410 |
400 |
4.125 |
0.015 |
400 |
3.81 |
6.0 |
Offset grind crank to 3.81 stroke.
Check rod to block and rod to cam clearance. |
| 420 |
400 |
4.125 |
0.015 |
Custom |
3.875 |
5.85 |
Check rod to block and rod to cam clearance. |
| 434 |
Custom |
4.155 |
None |
Custom |
4.00 |
6.0, 6.125 |
Use Dart or GM Rocket block w/.391
raised cam |
| 454 |
Custom |
4.190 |
None |
Custom |
4.125 |
6.0, 6.125 |
Use Dart or GM Rocket block w/.391 raised cam |
|
| Big Block |
| CID
|
Block
|
StockBore
|
OverBore
|
Crank
|
Stroke
|
Rod
|
Additional
comments |
| 481 |
454 |
4.250 |
0.125 |
454 |
4.00 |
6.135, 6.385 |
Check cylinder wall thickness before
boring. Check rod to oil pan rail, rod to bottom of cylinder walls
and rod to cam clearance with 6.385 rods |
| 489 |
454 |
4.250 |
0.030 |
Custom |
4.25 |
6.385, 6.135, 6.535 |
6.385 rod recommended. If using 6.135 rod you must
use a tall deck block (10.200) |
| 496 |
454 |
4.250 |
0.060 |
Custom |
4.25 |
6.385 |
Use 9.800 deck height |
| 509 |
Custom |
4.000 |
None |
454 |
4.25 |
6.385, 6.135, 6.535 |
Use 6.135 or 6.385 rod with 9.800 deck block.
Use 6.5635´rod with 10.200 deck block |
| 541 |
Custom |
4.375 |
None |
Custom |
4.50 |
6.535 |
Use 10.200 deck height |
| 572 |
Custom |
4.500 |
None |
Custom |
4.50 |
6.535 |
Use 10.200 deck height |
| 604 |
Custom |
4.500 |
None |
Custom |
4.75 |
6.535 |
Use 10.200 deck height |
| 605 |
Custom |
4.500 |
None |
Custom |
4.625 |
6.535 |
Use 10.200 deck height |
| 612 |
Custom |
4.500 |
0.030 |
Custom |
4.75 |
6.535 |
Use 10.200 deck height |
| 615 |
Custom |
4.600 |
None |
Custom |
4.625 |
6.535 |
Use 10.200 deck height |
| 632 |
Custom |
4.600 |
0.030 |
Custom |
4.75 |
6.535 |
Use 10.200 deck height |
| 638 |
Custom |
4.625 |
0.030 |
Custom |
4.75 |
6.535 |
Use 10.200 deck height |
| 723 |
Custom |
4.625 |
0.030 |
Custom |
5.375 |
7.645 |
Use Merlin Superblock (11.625 deck
height) |