We've been using a clutch fan for the last 7+ years on the '63.
Lots of street miles and strip passes with zero issues. We do run the Moroso underdrive pulley.
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
