All the parts in the overdrive assembly were good, so just a clean up and new frictions/steels. Got lucky, the overdrive piston shim and the intermediate shaft spacer were right on the money so no last minute hunt down of weird parts. Also got the trans case thing sorted out tonight. Came out pretty well. Had some burn through, but nothing horrible. Was able to get it pretty nice, carbide > flap wheel > cartridge roll and then draw file it level. Just a lot of time, but better than getting another trans core. Trans controller showed up also. Will put that together next weekend.