It's been about a year since my 378 swap, and since I did, the compression has been high. I'm about ready to pull the engine again and get even thicker gaskets from Lani to get it perfect.

All i can think is that the head must have been shaved without my knowing it at some point and that didn't equate into my gasket thickness calculations. I'll get an exact compression number by the weekend.

I know that I can look it up, but spending 2 hours sifting through forums to get different numbers is never fun. My question is...

What's the general gasket/compression rule of thumb for thickness equals compression? (plus "?" thickness = minus "?" psi)