OK, so 8 months later, I have finally done something. I spooned the old tire that I pulled from the roller last summer onto the spare rim from the basket case and threw it on the bike (as you can see from my avatar I only had a wheel and tire on the front). So now I can move it around easily.
That done I rolled it into the big garage and pulled the clutch cover. Off came the clutch and pressure plate for inspection and cleaning. All looks good. I also cleaned all the old gasket off the cover and engine case in preparation for the new gasket I bought last summer.
Today I will be putting the clutch back in, install the new gasket, put the cover back on, install the spin on oil filter conversion that I held onto when I sold the GoldWing, and then on with the filter and in with fresh oil.
Sadly still lots of work before I can try firing it up: the late wiring harness needs to be adapted to the early ignition key setup, the carbs need to be double checked and installed and I need to sort out a gas tank, although I think I know what I am going to do about that.