Guess I should update this for Motoman.
First off, this thing is in excellent condition, other than paint off lower front a arms it isn't even worn from boots or such.
Started with leak test because of concern that crank seals might be dried out. After replacing the carb and crossover clamps with screw clamps because they wouldn't seal, the fucking boost bottle itself was leaking at the end. Okay, swap that out with welde unit, all is good now.
Smoked a cigarette, started pulling hoses, 26 minutes later hadn't lost an ounce. Actually didn't lose pressure until I started removing head nuts.
When installing the caps for test, the left piston had rust stain on it. OK, not good, but maybe not end of world. Pulled head, not pretty, pretty heavy rust (relative).
Used a harmonic balancer puller to lift cylinder off piston. Didn't get easy until almost all the way off.
Piston and rod were standing up like a wedding dick !! And crank still won't turn, and never will again !! No clue how it could have rusted that bad.
Don't think even a BMFH would have helped, lol.