Thanks Timmy,
Scanning the memory banks, I think I might have taken off the side pull handles back in the day, perhaps because to a 14 year old, they looked 'sissy'.
The memory is fuzzy, but I also think I might have had 26 inch wheels. I'm 5'7 now and might have been less then. The bike shop repair guy did not think that was plausible. Are 26 inch wheels common, or were they? I found a few Weinmann wheelsets like this one: http://www.ebay.com/itm/150815884186...#ht_1635wt_900
and this one: http://www.ebay.com/itm/160801082059...#ht_1580wt_900

The first is listed as 27 inches, the second is listed as 700C (does that mean 700 millimeters?).

I think, with a replacement pulley, both derailleurs should be operational. The cables are actually still attached to the shift levers. I can't imagine how I'm missing the bushings to attach the levers to the downtube mount, but the cables are still intact?