dave; btw, btw. if youll check out some more of the models and years, for the 426 hemi, i think that youll find that not all were taken at 5000 or 5200, some were rated at 4500 rpm, least that is what my book says and as were a couple of my cars. it isnt me, it was wilcap and the article in hot rod that said 600+, you are quite welcome to decide to disbelieve all you wish. i can tell you that as the past owner of 6 different hemi cars over a 20 year period, that they DID make QUITE a lot more power in the 6000 and up area than they did at 4500 or 5000, DRAMATICALLY MORE POWER !!!! if youve never owned a hemi then you just dont understand what they did in 3 rd and 4th gear at full throttle, as the r's climbed from 4500 to 6500[ish]; they felt like a freight train coming on, and on and on, nothing like them that ive ever driven. it is [was] something like the [really] big brother of the free boost that the long rams give, as the r's go up and they come on. JEFF tucson az. [Non-text portions of this message have been removed]