My experience is with a Schwinn Le Tour Luxe from about the same time as your Trek. I did the conversion and it was completely straight forward. I had trouble finding and getting cantis that would hit the rim correctly. It also made the steering very twitchy with narrower tires. That was mostly resolved with 35mm tires which was a little wider than I ultimately wanted. In the end I personally would like to go back to 27" tires on the bike. The main thing holding me back is spending the money to build the wheels that I would want for a $10 thrift store bike. I should also mention that I cold set the frame so that I could get 135mm hub in the back.