It could very well be too much cam, I'm putting it on alky (toilet) this year, I've already got it changed over and ready to see how it reacts to the different fuel system. I've actually been pretty pleased with it so far, I've just been thinking about a different short block. On a side note, before the RHS heads I was running Victor Jr's and it was running 6.80 best case, when i changed to the RHS it literally dropped .25 which I thought was pretty impressive. The only difference in the heads was the cc's, Victors=70 RHS=64cc, i'm not sure how much this affected the comp ratio but it sure did make a difference in performance. Both heads were straight out of the box and the only change was the heads themselves. I never really considered a cam change, but it might be what is holding back the 60' numbers (usually 1.41-1.42) and a smaller cam might put a little more bottom end into it. I guess the reason I ran it was I got it dirt cheap.