I am building what I hope will be an occasional driver and need advice on brand and type of radiator for a 400 sbc with a/c in a 56 Chevy pickup. It will have 10/1 compression and a stout cam 539/546 lift and 236/242 duration. I expect this thing to run hot because of the siamese cylinders and .040 overbore. Can someone recommend a brand of radiator and copper/aluminum and crossflow or downflow design? Should I run electric fan or fans? Any help will be appreciated. Thanks