Your first decision needs to be which heads.. And I strongly suggest something with closed chambers... Whether that's a set of 915's or one of the aluminum offerings.. It's up to you.. Eddies/Stealths/MP 452's (the new aluminum ones that are made by edelbrock for MP not the iron 452's you have) are gonna make the number alot easier.. But mostly closed chambers so quench & a reasonable compression ratio are easily attainable...