Radiator choices 26" or 22"

It's a race car. Modify the core support and put the 26 inch radiator in it. Run the BIGGEST two core you can get. 3 core won't cool as efficiently.

Use a high flow water pump.

Cutting corners on the cooling system of a race car is a bad thing.

You can't over cool an engine.
Got the high flow water pump on it. But when your right. Your right. You cant over cool the engine. And it is going to see primarily if not most of its life on the drag strip. With the occasional cruise over to the car show a mile away.