How much decking is to much?

Just for fun, let' say I can cut as much as I want off the deck and or heads.

How much can I take? I wouldn't go more than .100" without testing for minimum thickness.

Why I ask is I want to raise my comp ratio and I have accss to a big mill. Access does not mean advantage.

What are the draw backs? Cost, fixing everything that will be messed up by doing it, loss of flexibility in intake choice.

1976 360, W factory heads

I did it when I was much more ignorant. There are better ways to achieve a performance goal than using a machine you have access to. Especially if it's not setup or equipped to do automotive engine work.