3speed od, out of /6

The OD 4 speeds used a 5.125" bearing retainer. The dual pattern bell housings were made to accept a 4.35" bearing retainer. Measure yours to make sure. If yours won't work there are plenty of small block OD bell housings out there. You will just have to find one. Look for '76 up 318 OD from A,F,M,J, bodies or trucks/vans.....