Too much conflicting info to know what I got. Big bearing on one side and smaller on the other? Or the same. 9 3/8"? It's 10 bolt on the cover. 12 bolt on the ring gear. 3.07 ratio. Would like to get a 2.78 posi.
Well if you find a rear a lot did come with 2 series gears as most big cars were made for freeway drives as they were the comfortable cars to make a long trip ...wheel base long - more room etc. Jim 1966 late to 1970 electra, estate wagon, wildcat, riviera.... all these cars you can use the guts in your housing... except axles shaft length... but all axles are 30 spline bolt in.