I just picked up an unkn model Miyata,
Grand Compe calipers and levers.
Shimano AX crankset, pedals (required), stem, seat post, RD. Has a DA AX FD.
Hubs are grimy, but share a logo with the RD, so I’m hopeful.
My stash has 600AX calipers that look neat but stop? Not. They’ll do.
Managed to find a DA AX crankset in my stash, and pedals.

The dilemma: build it that way and ride it twice a year, or toss on stuff I’ll use?