4speed OD

If you had the od already and your looking to go to a normal 4 speed you can probably get a ring to take up the gap of the oversized od input bearing retainer. brewers sells them might be easier than finding/swapping a bell.

Shifter mechanisms will interchange. Like said the 3/4 shift rod is flipped on an od. The reverse and 1/2 rod should swap over and the 3/4 I'm not sure if it would swap over.