FWIW, when I set mine up for pump gas a few years back I could not get it to run under 205-210 on hot days. I already had the big mezier water pump and an alum becool radiator with dual fans. I did nothing but order a custom Ron Davis radiator with a built in shroud and dual SPAL fans. The hottest the motor would get even on the hottest days was 185 after the radiator swap. There is a BIG difference in aluminum radiators, you get what you pay for.