Hope I'm not violating any zombie thread rules here but just incase someone was curious about a specific model. I recently converted my 1983 Trek 720 to 700c rims from the 27" with the original DiaCompe GC 960 brakes that came with the bike. It didn't work with the crummy narrow road rims that I had originally slated for the job (19.6mm outer width) but a pair of H-Plus Son TB-14's (outer width of 23mm) made all the difference. I regrettably cycled through lots of new cheap canti brakes before going back to the original ones so hopefully I can save someone from that same fate if they're trying to convert an older 720 and have them just reach for some wider rims!

Re: the original post, works great as a Gravel bike! Not the quickest of bikes off the line but dang is it smooth and unloaded it will feed back every extra watt you put into it!