Radiator suggestions

I need to replace the stock radiator in my 93 Chevy, but I don't think I can go back to stock. My new engine puts out 700 HP and I still want to be able to tow up to 20,000lbs. So I am looking for recommendations on what brand, what size will fit, and what type of electric fans should I use to cool it all down.
The current engine is the stock 454, the new engine will be a 555.
Trans TCI 4l80e six speed.
Not sure what other info you might need.
Any help would be great
Thank You
Jim

We usually just get a factory replacement that is an all aluminum version. They seem to circulate more and stay cooler.