If it was a bike that is replaceable and not one that you won't find in the next 10, 20 years or for that matter ever, a Confente, my Rauler, I wouldn't hesitate to put couplings on it if that would mean I would get to ride it that much more. Of course I ride my bikes and don't just hang them for show.
Just do it and pedal on.
Mark, won't get to 80 and wish I would have ridden that bike more, Poore