Getting ready to tear down my wm20. did a ground up build in India in 1994 and brought it back. ran for a few years and then garaged for 15. Got it started last year for a while, but then clutch started slipping (maybe just adjustment).
Friend recommended doing a complete tear down and sending the drivetrain off for a full rebuild.
1) if this is a good idea and
2) good shops with this experience out west (we are in UT).