My guess would be the different cam. I have never seen one of these engines first hand. If the 292 cam grind was used that would bump the power a lot IMHO. The 250 cam is bigger and the 292 is bigger still. Although not as big as say the Comp 252, it would still be quite a jump over thw stock 230 grind. Was the exhaust pipe any bigger? A quick look at Toms Chevelle would tell pipe size. Knowing what besides the Crome was different would clear up a lot of history. Jay 6155
