Saginaw pump pulley for ford

[Zjman]

Ok I got a 351w with v belts, my water pump and crank pulley take the wide belt which is like 1/2 inch, I converted my power steering pump over to Chevy Saginaw style, my problem is the Saginaw pulley takes the narrow belt, I'm running the narrow belt but at high rpm's the belt twist and pretty much becomes useless, so does anybody know the part# for the pulley for the 1/2 inch belt, mine takes the pulley bore .7472 which I assume is .750. Searched like crazy and Google has failed me. So am I gonna have to change my ford pulleys over to narrower belt or what


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