All for nought; took it up this morning to get gas, and the overdrive dropped out at about 50 MPH (accompanied by a "chirp" of the rear tires...) and isn't engaging since. I'd drive it in 4th direct (1 hr each way) except for that "burnt clutch" fragrance that came with the drop out. Until I get a chance to look inside, it'll have to stay parked.
One of the last places I want to break down, is at the top of The Sunshine Bridge! I don't mind heights at all, but I'm not particularly fond of the roadway swaying beneath me!
I reused the overdrive cone-clutch, as it's friction surface looked perfect, but that may prove to have been the wrong decision...