I know there's been threads about this before, but I just want some more input. I've already decided I'm going to do this, both because the casting numbers are fairly close to my car, and my great uncle gave me the 396 for free as long as it goes in my Bel Air. The engine is a 325hp 396 from a 1966 Impala with a TH400 automatic. A guy that drives truck for my dad did the same combo in his 1970 Chevelle and he's really happy with it. For the long block, I'm going to do the 454 crank, with ARP main studs, and I've heard there's some KB pistons that make up the difference in stroke. I think I'm going to use the stock heads and port and polish them. I'm not sure what I'm going to use for a cam, but I think I'd like to use a Comp mutha thumpr roller cam and Comp roller rockers. Just wondering if anyone has any tips.