Cooling Issue - 1964 Dart GT - 273 with automatic and A/C

A small part of the OP's troubles may come from where he lives. The Columbia, SC area gets stifling hot! When somebody in hell pisses the devil off, he sends them to Columbia for punishment! :eek: @Dart5150 research water pump pulley's for 64-69 cars with AC. I think the pulley's on them are smaller, to overdrive the pump like Rob said. Bouchillon Performance, down around Charleston sells reproduction pulleys, so maybe they will have what you need. You will need one for a 64-69 car because you have a cast iron water pump. The depth of the pulleys changed in 70 when they went to the longer nosed aluminum water pump. Your Dart sure looks nice, so I hope you can get it sorted out.

:thumbsup: