Looking for a seal that goes behind the rear torque tube bushing for a 51 chevy with powerglide. I am probably going to install an oakie bushing for additional support of the drive shaft, but I can't see any sense in installing a new rear bushing, and then installing the oakie bushing with a seal and then having the new rear bushing have no lube. I think it would make more sense to install new rear bushing and seal, and oakie bushing with no seal. I don't see where any of the vendors carry this seal. Anyone have any suggestions?