I am getting my ride ready for Eroica in April, and I just bought a first generation chorus partial groupset. I need advice on BBs. I used to just stuff one in and go, but with all the reading I have done lately, I am less suref of what I need. I have a cartridge BB I took off my Allez when I put the triple on it years ago, can I just get Italian cups and go from there? Do I need to worry about BB shell width differences? Do I need to do a bunch of measuring? What length spindle is right? If the BB shell is wider on my Italian bike than it was on my Allez, do I need a longer spindle? And lastly. Anyone have a set of cartridge compatable cups that will fit Italian threads and my BB cartridge that I can buy or trade for? (assuming I can use this BB cartridge) .all I need is cups and maybe crank bolts.

Thanks in advance.
Mark