What size bolt will fit this?

1

1wet.vette

Guest
Hello. I need to add a ground wire to my powermaster alternator. Its been making a whirring noise I got it replaced but its still doing it and the gentlemen at power master informed me that you need to put a ground to the engine block for the higher amp alternator. I plan on doing so but dont know what size bolt goes into this hole. Any help would be much appreciated. The second photo is the location Im going to be using but its a little hard to see. Im almost sure that both are the same size bolt though because I tried seeing if my old header bolts would work and it was to small on the both the holes. Also if anybody has any photos of ground location they did for theyre alternator that would also be nice to see:cheers:

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