I apologize ahead of time if this question is a repeat (I searched to no avail) or offends vintage collectors. I have a really nice 1970 Bridgestone Grand Velo with Campy Record components. I ride over a lot of hills and would like to change the gearing, but it seems I am really limited in what I can do with the existing drivetrain. I was wondering if I could put a compact crankset on this or, if this is not possible, replace the entire drivetrain with a modern one. I'm not interested in keeping the bike authentic. It is the best riding frame I've ever been on and I want to ride it!