Does anyone know if the common aftermarket power steering pulleys for early Chevy and other GM applications are a direct bolt-on replacement for pulley No. 1235776 on a '71 Riviera? Or of another pulley that's essentially the same as that one? It's 5 inch diameter with a 5/8 shaft. It's keyed, not pressed on. Common early GM Saginaw-style pump. This is an example of the common aftermarket pulleys: http://www.jegs.com/i/JEGS-Performance-Products/555/514196/10002/-1 As far as I can tell, the aftermarket pulleys are just slightly larger in diameter, but I could be missing something else. Thanks for any information!
So the answer is, although the aftermarket pulley will fit on the pump shaft, the offset is different than the stock pulley and the aftermarket pulley therefore would not be aligned with the crank pulley. Good to know.
