Yeah this thing is very very old and obsolete. Luckily the gears look good but the thing could use a reseal job because it weeps in several spots, but the shaft seals are holding good. I guess with these units the 3 speed ones aren't as common. Usually the boxes this size were usually 2 speed, Direct and OD.
I've got everything set so the driveline smooth so for now the brownie is staying. I still need to make up another shifter for the left side for the D and OD brownie shift rail. The double rail shifter that came with the thing doesn't clear the getrag.