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Old 09-05-2010, 12:45 PM
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I have a different engine (1975 Chevy 350), but I found that there was quite a bit of play in how the PS bracket could be bolted on the pump, and it made a lot of difference in pulley alignment. I first used a metal carpenter's square to insure the bracket mounting surface was exactly 90 degrees to the pump body, and that the pulley surface was exactly parallel to the mounting surface (I found I had a bent pulley).

I also determined that the custom bracket for my Seltec AC compressor was interfering with the stock PS bracket and pulley, and the interference depended on how far I had to move it to tension the belt. I had to remove the AC bracket and grind it in a few places to make sure the PS pump could move freely in the entire range and not get pushed out of alignment by the AC bracket.

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