No specs, don't know what kind of impeller or what makes it high flow:
http://www.ebay.com/itm/194-230-250-Chevy-six-High-Flow-aluminum-water-pump-/191809542176?hash=item2ca8bd5820%3Ag%3ABX0AAOSweW5VE2iL&vxp=mtr
I'm thinking of getting this later:
http://www.flowkoolerwaterpumps.com/store/Water-Pumps-Chevy-CID:-153/2.5L/c21_27_93/p188/Pump:-1777%3Cbr%3EChevy,-GM,-Buick,-Olds,-Pontiac%3Cbr%3E%281968-1974%29/product_info.html
