[GT182]

It's funny that back in the days these cars were new and the used ones a few years old, there was no overheating issues and no one used aluminum radiators.... unless I suppose they were drag racing. Even the guys I knew that ran pontiac engines on the dirt tracks didn't have many problems. Problems they usually had were punctures.

The 3 Pontiacs I had back in the 70s.... 66 GTO, 63 GP, and 66 Tempest Custom.... with their original radiators never overheated, even on the hottest days of summer. Not even my buddy's 421 62 GP with the cars original radiator. The owner of the local radiator shop here says it's only because of the larger tubes that an aluminum radiator cools as good as or cooler. Other than that they're no better than copper and brass, and mostly not as good. And he should know.