I already posted the water pump and pulley size information on the first page of this thread. AC cars, both small and big block, used standard 6 blade pumps while non-AC cars used 8 blade high volume pumps.
But the AC cars had smaller pulleys, which overdrive the water pump and fan. The non-AC ratio is .95:1, the AC ratios were 1.3:1 and 1.4:1. So the AC pumps were overdriven 35% to 45%, and the HV pumps were only a 20-30% increase in flow. Meaning the standard pumps on the AC cars were still moving more volume than the HV pumps on non-AC cars.
