Should I get an anuminum radiator?

[Mr70]

What are your habits/conditions with the car?
Daily driver-nightly street-drag strip-trailer it?
I would suggest sticking with the original Harrison 3 or 4-core,as it should cool it off just fine for most ordinary uses.And don't skimp,get a good solid durable clutch for your 7 bladed fan too.
I would contact Lenny over at A-Len in Downers G.
He has done hundreds of these and knows them inside an out,and he still has a few of the old tanks stock piled last I talked to him.
His skills,experience and equipment are second to none.