Radiators: Is 22" enough for 400 HP?

FredS said
I have a stock tank 22inch with a 3 core 5/8 tube rad, with clutch fan and shroud and my IMM built 408 pushing close to 600HP, and it stays under 180 with these cooler temps, and have never seen it go above 200.

This is good to read even more so considering your location vs. mine. I'm doing a 360 for the wife's '67 Cuda.