cooling ?

I am building a 1969 Dart automatic with a 440 using a Shumacher mount kit for a 318 K-Frame. I'm expecting 550 to 600 horse at the crank. Currently, I am at the point of fitting a radiator so I can cut the support to the proper size. While researching aluminum radiators, I found that there are many different choices, with a wide variety of price ranges. What aluminum radiator would you suggest, and with what electric fan(s)? If necessary I can fabricate my own brackets. Any advise you can give is greatly appreciated, and really helps cut down on the guess work.