wheels and tires like you say will help. my problem is I'm running 3/4 ton four wheel drive, so it won't work for me. as for a radiator, the a-body Mopars (valiant, duster etc.) from the late '60s and early '70s should work. I am running an electric fan from a 94 Buick Lesabre in front of my radiator. Still working on paint and body so haven't got the full road test in yet.