Power steering cooler for Hydroboost setup racing?

[anguilla1980]

This is going on a 1969 Firebird that currently has no cooler and these cars are notorious for boiling the P/S fluid from the factory with even a little spirited driving. I now have a fast ratio steering box, wide front tires, and with all of my upgraded suspension I'll be using the car for club road racing, so much longer sessions than just auto-x. I'm in the CA desert where you can imgaine the worst possible tempreature scenario plus the steering box is practically touching the headers, only protection now is coated headers and a heat shield on the side of the steering box.

I'm looking at what power steering cooler to buy. I will be running a Hydroboost which I believe adds considerably to this as the pressure is so high. I plan on a generic plate type Derale universal cooler, looking for some guidance on how many cooling rows and dimensions.

This seems to be the most basic one:

https://www.summitracing.com/parts/der-13215



But due to my vehicles demands, I'm considering this one:

https://www.summitracing.com/parts/der-52506

Suggestions, comments? Thanks!!