I'd try to find another 10 bolt 8.5 housing. If gor street occasionally raced. Strictly race I'd blueprint the 8.5. 12 bolts and 9" to me are $$$$.i guess I'm cheap. Another alternative is the older 9.3 Pontiac,olds rears. Depending on your location parts gears posi available. Another 8.5 first choice then have it jigged and welded. Old Pinion head here is the guy to talk too.
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