thanks for the replies guys keep em coming. How much CR am I looking to pick up with the Magnum heads, vs the stock 76 pass car 360-2bbl heads that I took off this motor? (all else being equal-- assume stock piston for now) I would love to get this motor to ~9-1/4 to 9-1/2:1 CR but not much more, I want it to still run on 87. If I were driving it I might be more willing to have to run 91; but with it being my son's truck, and with premium still being half a buck more a gallon (some stations even more) than 87, I don't want a motor that "has to" have the expensive stuff.
I will look into that cam for its specs as compared to what I was gonna run. I'm "NOT" saying I have to run a COMP brand cam, either.