I have a World block. 540", 180* thermostat, OE style radiator, and OE style water pump with clutch fan. Cools just fine. But boy, is it heavy.

If this motor is running 15* to 20* warmer than your old 440 and is not a worry, how cool did your 440 run?

A little more info will get you more input.


Master, again and still