If I remember correct? Bracket, 3 bolt holes to block, 1 stud for AC, 2 holes for ps pump. Alt goes thru tensioner & those ears break often. I just had one welded up & you cant even see it.
Glen at Highway Stars Buick Grand National Parts Home Page has them in oem or aftermarket & gbody should have some.
yes ,,the alternator doesnt contact the main accessory bracket , it rest inbetween the ears of the tensioner assembly
the tensioner assembly is bolted to the main accessory bracket with two short 15mm head bolts , the alternator fits in the ears and a long bolt goes through