Any 6 lug rear end 1972 and earlier fit the opening. You will need to add weld-on spring perches available from ClassicaParts. The head of the center leaf spring bolt goes in the forward hole of the new spring perch (not the center hole). This will place the axle close to the factory correct location, which is forward of the center on the fender hole center line. If you put the bolt head in the center hole of the perch, your axle will be too far forward.
