390 w/open chamber heads

Well see, I take some things for granted. Whenever I talk about decking a block, square decking goes without saying. Anything more is simply regarding how the engine itself is built. Like my 383. It's zero decked for the combination of parts layin in the spare bedroom. But, it was also square decked as well. Anything not involving squaring the decks up with the crank center line is a waste of time and money.