[RRD]

Coyled,
My last 408 had your cam specs spot on. It was in an early Mustang chassis, and despite all the nylon straps and big guys sitting on the rear deck, once the dyno hit 425 at the rear wheels, the rest was smoke; just not enough tire section to get the job done. I was using MUCH modified N351 "Yates Style" heads that had very generous ports. Frankly, huge. If the port size was any smaller, and I could have enjoyed a bit more velocity at low RPMs, it probably would not have been a full time job to manage it on the street. Yes, foot to the wood, it would deposit the rear tire until I ran out of guts/stupidity (take your choice). That particular head only began to work at about 3800-4000, which is above where I want to go now. Mckoewn is saying my last combination was not well matched; it was not the cam at fault. I guess to have the Yates and not give it the cam specs that it was designed to accompany is a waste of the heads and intake. You guys are right also, between the displacement and weight issues, um, we're not moving a city bus from stoplight starts here, are we? Anyway, thanks for the input, I am going with Mckoewn, who, BTW has his own profiles ground on billet cores, not cast iron. Even with roller rockers, the amount of spring pressure we're all having to run would seem to wear out an iron core a bit faster.