the 390 is not in it yet. It now has a 332 bored and 390 crank, rods, and pistons in it. Stock 332 heads. I have a 63 390 stock 2v. as far as i know no decking has been done to either motor. the 332 is a 4v and solid cam, 390 is hydraulic cam and lifters. Other than stroking of the 332 everything else is stock. have edelbrock 650 carb on 332