This is a used lower alternator bracket taken off of a 1972 Impala with a 350.  I found 2 interchanges and one showed from '69-'86 and the other showed '69-'74 Chevy small blocks.  I'm not sure which is right, but I put the one with the lower interchange in the compatibility list.  This one is used and does need to be repainted.  But, it is a genuine GM part and isn't bent or rusted up.  Please contact me if you have any questions and thanks for looking.