I don't have ac in my '57 but everything else I drive and the house has it, here in southern Michigan it's the humidity that ac is working on to control comfort.

1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy