spring pad location

It's probably a 62-63 B body housing. If you have the axles from it, check them in the rearend chunk you plan to use to see if it has the same axle splines as whatever axles you're going to use, before you go to the trouble of putting the housing in the car. That housing would have come with the old axles with the splined end on the brake/hub end of the axles. Those axles make good property corner markers! :BangHead: