heating up a little more

George Jets said

Can ask @340mike how his '72 Dart with a 440, factory air, stock exhaust manifolds and power steering, is set up for cooling.

If he can keep that one cool running the AC, same setup should work for you. Think it is close to a stock cooling system on that one.

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It's funny you used the word "stock". It seems the further away you get from the stock layout, the more you're chasing over heating. Stock with the possible exception of a radiator large enough to handle "whatever" you have under the hood should be good enough to cool just about anything.