[HWYSTR455]

The issue here is the OP is not sure if the engine is zero decked.

Also not clear of the exact head cc.

And, he's contemplating a 4.25 stroker kit now.

Using the Butler calculator:

Stock crank @ .030+, .020 in the hole = 10.15

Stock crank @ .060, ,.020 in the hole = 10.27

Stock crank @ .030, zero in the hole = 10.57

Stock crank @ .060, zero in the hole = 10.70

4.25 crank @ .030, .020 in the hole = 10.42

4.25 crank @ .060, .020 in the hole = 10.27

4.25 crank @ .030, zero in the hole = 10.66

4.25 crank @ .060, zero in the hole - 10.79

The available pistons in the Butler stroker kits are -6 and -22 dish.

4.25 crank @ .060, zero in the hole w -6 dish = 10.99

4.25 crank @ .060, zero in the hole w -22 dish = 9.58

4.25 crank @ .060, zero in the hole, -22 dish, and .027 gasket = 9.81

Either the -6 or the -22 would work, with the .040 or .027 gasket.

If you wanted, you could tone down the cam if you'd like even.

Can sell the old rotating parts to offset the new build as well.


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