I would put your bike as a 1986 Le Tour based on your photos and these two pages: http://www.trfindley.com/flschwinn_1...986Ltwt12.html http://www.trfindley.com/flschwinn_1...986Ltwt30.html

The Le Tour was the only bike in '86 to use True Temper tubing (I saw a sticker in one of your photos) besides the Traveler but the Traveler had stem shifters with cable guides brazed on, while yours has DT shifter bosses.

The Le Tour was a middle-of-the-line bike. The Shimano 600 pieces are not original and serious upgrades from the stock components. Most of the 600 is from the early-mid 80s (6300?) while the rear derailer, front brake, and shifters in particular are from the later 80s "tri-color" group (6400.)

I'm not sure why a Le Tour ended up with a 600 group, I'm guessing some tall guy loved the frame and wanted to hang some nice parts on it. How much is it worth now? Not a whole lot. Maybe your pictures are just dark but the bike looks dirty, and of course some of the decals are missing. The saddle looks awful and the bars aren't wrapped. It looks like a project in its current state and projects sell for a big discount. The huge size hurts it as well. Right now, I wouldn't expect more than $100 for it but the parts are worth a lot more than that. This bike screams part-out. But only if you have the time/knowledge to take the thing apart and sell the bits individually. From the sounds of it you are probably better off selling the whole thing as-is for someone to harvest the parts.