833 Bearing Retainer Sizes

If the bellhousing is a stock OD it has a 5.125 pilot hole. The small bolt pattern 5.125 bearing retainer is relatively rare, partial one year build. The 4.805 retainer can be either. Check out the retainer on the trans you want to buy. If it has the 4.06 bolt pattern bearing retainer then just pick up a retainer and you can swap back and forth if you want.