Doohickie,
I've seen your Prelude...nice bike! Wanna trade for an '83 Supercourse that's too big for me (25")? Then I can make all the comparisons myself.

I've got an '89 Le Tour that I've been considering upgrading, but I was comparing it to the '87 Prelude because it's the highest level Schwinn with eyelets (other than the Voyageur), and I want somethign with eyelets, 700c wheels, and recessed brakes. The '88 versions were reversed, with the Le Tour having 72.5 HT & ST angles and the Prelude having the 73 and 74 angles, so comparing my '89 with the '87 Prelude made the most sense in terms of geometry differences.