I'd take one and cold set the rear to take modern parts and throw some 11 spd kit on it. Seems like your into the steel frame ride so would be nice to have one that is up to snuff.
I have an old schwinn 87 circuit sitting with oem kit, I need to one day make it modern. I don't ride it much cuz the down tube shifters. The columbus SL tubing is such a nice ride on my crap roads.
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Rule #10 // It never gets easier, you just go faster.