i think rad is copper not brass which conducts better than aluminum. copper bends brass does not. i do have a shroud plastic with fan half way in. distributor advance is connected to proper place now on carb. plugs were changed while in shop because plugs they put in before were too short. plugs that came out were white indicating lean. do not understand what you mean by degreed the cam. please explain. mech had disconnected vac advance but i will try it again. good suggestion on new aluminum radiator but would like to hear from more of you on what you suggest. thanks a million guys.