A-Body 440 cooling problem

if you don't have a shroud, get one. it helps pull the air thru the rad instead of scavenging air from all over the engine bay. are you running a 180* HP stat? hi flow water pump? aluminum does not cool more than copper/brass. the rate of heat dissipation at 180* is higher in copper/brass than aluminum. they are just lighter, and have 1" tubes and claim to be better than stock rads(2 row). yes they can be better than STOCK, but a high effieciency core(3/8" on center tube to tube instead of 1/2") and a 3 row with a good clutch fan and shroud is better than stock. use a milodon/mr. gasket stat(they open with the flow of water, stant opens AGAINST the flow).