The forward half of the 319 is identical to a 318 except for a hole for the reverse lockout. It shouldn't be any problem to put the B-W OD on a serviceable SM318.

Lots of good info on the OD here.

I recently replaced some gears and the bearings and seals in one for my '54 GMC Suburban. I love it. Drove it from here to Phoenix last month and it was nice on the highway.


Charlie Hardin
II #5039