Great bike cmdr. The more you describe things, the better it sounds.

SunTour and Shimano were never together so far as I know. Looks like whoever built your bike up knew their stuff about getting performance and a good deal.

fwiw - SunTour had some arrangements with Sansin to make hubs. Sansin "Anglified" their name on some of their products to Sunshine. They made a whole range of hubs - all the way from cheapo junk, to Pro Ams - which are just about as good a hub as any you can find from that era.