You're asking a question without giving the information needed for an answer.

What's the engine? Do you know the combustion chamber size of the heads? If not, the casting numbers would help. What are you planning to do with the engine?

You don't shave, mill, or surface heads to .030 "over." The .030 is the amount of surface removed. A stroker is an engine with a longer than stock stroke.

Oldman2
Gettin older by the minute