Bigger Radiator Better
 

need a new radiator[hole in it] for 2002 cummins, 6 spd. is there a thicker, bigger replacement? I tow heavy and have over heated in the pa hills !!

A new, clean radiator will do you fine, they are plenty big. The problem is that the oily goo that overflows from the breather gets slung all over the radiator by the fan. Put in a new radiator and move the breather outlet when you get time so this doesn't happen again.