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it's .005 i just say zero because thats easier. i used the kbs with 452 heads. later changed to eddy performer closed chamber, cut the heads to get my cr up. thats why i want to use the same block, heads and intake. 440 source list it at .025 in the hole, i guess thats on a stock/uncut block. thinking i will end up about the same as now so maybe my cr and piston to valve will not change.



Sounds like you have it figured out , I'm building a 383 based stroker also , 3.9 stroke , 1.32 ch piston with a 6.700 rod .

What size overbore is your block at ? What rod are you planning on using ?