Just looking for advice and direction regarding the final pieces of a C&V Italian-American project. I've built up most of a 1980 Masi Gran Crit with a relatively modern 105 group. What's left is picking the crankset and BB.

I'd like to stick with 105 to match, but I have concerns regarding the Italian threading. I picked up a Shimano UN 54? square taper to try to get away with 600EX cranks, but it just doesn't jive.

Does Shimano make a road double crankset and BB that wont conflict with the Italian threading and look appropriate with what's already installed? Don't need to keep the UN 54, but it'd be nice to save the money.

As always, I greatly appreciate the collective advice of C&V. I'm really excited to finish this bike, the weather is finally getting warmer in MA, and there are hills to be climbed.