there are tons of 8.5 10 bolts in yards,70-75 novas,70-81 camaro/firebird,70-76 full size chevys,find one with 2:73 gears and up so carrier same,in late 80s trucks beefed up to 30 spline,but all others were 28 spline axles like ours,lots of posis out there as well...