I’d always avoided the Pontiac heating and cooling pitfalls. I never ran AC. Always used a 4 core radiator and a 160° stat and had no issues staying around 180-190° with my little iron head 406. Then I installed Vintage Air and all of the sudden we’re seeing temps at 220. Seems AC puts quite the load on the cooling system. So I bought a new Cold Case radiator and a new 2747 fan clutch to replace my $100 O’Riley radiator that had done so well for so long. Tried two 2797s but they failed out of the box. Research indicates there’s an issue there. Anyway. After 1/2 an hour idling in the garage with the AC and lights on to create as much load as possible I can’t get it to idle over 170°. The radiator is so efficient it’s actually cycling the 160° thermostat. Pretty cool!
I didn’t even mod the new clutch. The Cold Case is an awesome radiator!
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