If you want 400 HP then I suggest you get a magnum motor and follow the low buck build that Mopar Action did last year or year before.
The 400hp magnum headed build is simple and laready figured out for you.
working the 308 castings over for more flow then choking them with a Performer intake seems foolish to me.
As for the Allpar comment, he's wrong. There is NOTHING heart shaped about the 308 head's combustion chamber, nor is it's compression ratio any lower than any smog era engine. He's probably thinking of the 302 castings on the 2bbl 318's which A. came with a carb from the factory and B. works just fine with a 4bbl carb as well, BTDT.
