Quote: Here's a 408 IMM built with full ported edelbrocks that ran 472HP with a 750HP carb. He can get the same performance with his RHS heads with less port work ($$).
Those heads weren't full out ported from what I recall. Good porting for the cam used.
450hp out of a 408-416 isn't real difficult. Just get it built right. Look at the one Brian built for the Car Craft article. 485hp/517tq with a 750dp carb. Ran 6.93-94 at 96-97, 1/8th mile in his 3300# car. You can save a few bucks here and there on that build, maybe put a milder cam in it as well depending on what you want.
