So, yesterday When I talked to the guy at the shop, he said he would test a couple things (at $85 per hour) and let me know what happened. My first instinct was to just bring it home and deal with no heat.
I decided to let him change out one thing, the amp, and tell me what he found.
Putting a new amp in caused HEAT!!! It wasn't the servo (yet) it was the amp stopped working.
So, I told him to leave it, charge me and I'll pick it up today.
So it's a happy-ish ending. Still more expensive than buying the part and replacing myself, but okay.
If the tranny gets done (I'm NOT putting all bets on the reverse band adjustment) then I will have spend less than $500 getting it all fixed!
If the RBA doesn't work, I'm stealing the tranny out of the DHs 79 SD for my car. His isn't running do to a very sneaky electrical problem. I now think of it as just a parts car.

Happy Dancing with the Fingers. . .

__________________
Ginny in Denver-ish
78 300SD, 265K (mine)