Small Block Bellhousing That Fits 4.8" 4 Speed Bearing Retainer
Basically if its a 23 spline trans its a B-body 383 trans with the 4.80 bearing retainer, but the good news is the 4.35 retainer will bolt right on because both trans. use the 307 small input bearing. If its an 18 spline trans it has a 308 large input bearing in that case find a lakewood bell, most of them came with the 4.80 bore and a shim ring to neck the 4.35 retainer up to the 4.80 bore. Hope this helps.