Well .067 if decks are full spec. still deck it down .027 and with the 413 closed chamber heads milled a bit to make up for the fel pro gasket not hard to get it to 10 to 1 or more.

Easy 9.6 to 1.

Think the original 413 are .082 down!

Last edited by Dodgem; 08/05/12 01:17 PM.