The hole size is nominal, so .904 is Chrysler. Not Chevy.

The lifter size SHOULD be made with the clearance built into it. Remember A-B=C?

A is hole size. .904
B is lifter size. .903
C is clearance. .001

I know some of the lifters are coming .904 and I ASSume it's so you can fit them but it's about impossible to hone a hole straight and round that's that small and short. A couple of tenths maybe.

Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston