Ware can I get an aluminum radiator for a 1965 f85 that will handle to 600HP. No a/c May seperatly cool trany.

 

Griffin radiator is in your back yard. Nice aluminum radiators with a couple version depending on HP handling requirements. And on the 65's the upper and lower tanks are stamped to look just like the factory, although in bright brushed aluminum (which you can polish if you're so inclined).

 

Summit racing has an all aluminum "stock" radiator.
I installed the SUM-380328 GM 27 3/8x 19 ($159.95!) in my 64.
Excellent quality and very inexpensive.
FYI, i did have to square off the bottom corners of the radiator support to fit the larger radiator, not a big deal.