Roller cam? What kind of timing are you running with the iron heads?
With my 416 and W-2 iron heads I am running 10.6 compression and 36* of timing.. its a decent size roller cam 260/270 on a 105 LSA installed on 105.. that with .640/.640 lift... on the street I run 87 octane.. I will run 93 at the track... I get on it pretty good on the street with the 87 and no issues
