Thanks for your input guys. I understand the theory behind the different size runners. I still havent heard someone say "Yeah, I ran a BBC with peanut heads and it performed like....."

Erik, long story on the heads. Basically, if GMPP can use them on a similar engine, then I dont see anything wrong with it. The short of it now is that I will either try and fix the RP's or go with the peanuts. Buyng a new set is out of the question unfortunately.

GRUMPY427...you reading this?? Was that you that did a mild 454 with the small port heads??


Any thoughts on that combo I found? HP seems a bit high but he claims he has a dyno sheet?