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Bolt sizes for A/C pump bracket on a V8... anybody?


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I am trying to mount an A/C pump to my RRC ('90 V8) for on-board air and I have no bolts that fit the threads in the three holes that locate/retain the big cast bracket to the head - could anyone tell me what sizes they are so that I can order some please?



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Hope this is of some use, there seems to be a bit of a choice!


That's brilliant thanks! :)

I had guessed that the long one was 5/16 and the short ones are 3/8 - just didn't know what threads & lengths.


BTW - I thought that the 90 RRC would be all metric?

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