440 for my RamCharger

Not sure on the factory gasket thickness. I want to be able to run 87 octane in this, so I don’t want the CR too high, I figured 9:1 would be acceptable.

That does make sense, and that engine looks killer.

What year is the block? I am jealous of the bosses on the left front under the head. Mine 67 block doesn't have those, buy my 65 413 does.