If it's not comfortable to ride, sell it. I had a similar problem with a beautiful 70something Windsor. Pretty paint job, chrome lugs, light for the vintage. It was too small though, even for a track bike. Small enough that I couldn't ride fast tucked because it hurt my arms, shoulders, and I couldn't expand my ribcage. I sold it to a buddy, bought a new frame and now we're both happy. A proper fit makes cycling so much more enjoyable, even if you don't look quite as cool. However, to quote a popular hipster fashion magazine, "To look good, you have to be at least a little uncomfortable."