i guess i have to say keep it, in as much as i went to the trouble to buy a '79 720 frame/fork off CL from some guy in NYC and had it powdercoated and bought a bunch of new to me shimano 600 stuff and built a set of wheels for it. OTOH there have been some improvements in the past 25 years, but depending on one's outlook on life they may seem marginal.

mostly i think i wanted it because at the time i got into cycling as an adult, i was destitute and longed for a full reynolds 521 trek frame and fork and had to settle for their entry model.