I found myself a 3.73 posi rear end out of an '87 Monte that will give me more "smiles" per gallon in my '81 Mali, but while removing the old backing plates I snapped the heads off of all 4 bolts. Can anybody tell me what size these are so I can re-tap the holes? Guessing 1/4 bolts but would like to confirm that with the community here. Thanks.
