[rexs73gto]

I want to add a bit here . I've run a 455 +.30 over for about 5 years now & it has a RA IV cam Crane factory blueprint , & it idles fine , has a nice loop to it & it's or was in my 73 GTO with 4 spd. & 3:73 rear gears. I get about 16 mpg's & it was running high 11's . I was running the 1:65 rockers & the car ran great. Ido have E-heads on it right out of the box which gives it about 9.6 comp.???? I think. I do run it on 87 pump gas to. I know what the lift is but right off hand don't know what the dur. is but I usually get funny looks & comments when I say I'm running this cam because it's an old cam. But I've run this cam in several 455's & a few 400's over the years & it always seems to work good. & by all rights this is a 30+ year old cam design & works great for me.