[Al Schober]

Wish you'd contacted us sooner. Also wish you'd started a new thread.
Do you have the Moyer Manual? If not, get a copy.
I suspect you lost the roller from the end of the reverse cross shaft opposite the nut. See the previous photos in this thread. The nut is supposed to turn easily and actually has a spring clip to keep it from turning on its own.
The shifting bar you refer to has a taper to it. When the shift cone in the transmission moves forward, the shifting bar moves aft and the taper rides against the roller and tightens the band. No roller? The reverse band doesn't get tight and you have no reverse.
Look in the slot in the end of the reverse cross shaft. Should be a roller about 12.4mm in diameter. If it's not there, we've found the problem and can address a solution.