As 51PhatBoy pointed out, it's a good idea to include a tranny cooler in your purchase, as I did.
I had a side-mounted trans-cooler in my old setup and it was right next to an exhaust pipe -- worthless!
Also, be careful what kind of cap you put on the new rad ... with an old engine, you might not want more than a 7 lb. cap ... to avoid putting too much pressure and creating problems with your engine.