Going to pick up a Litespeed Tuscany this weekend that’s missing the drivetrain. I’ll need a BB, cranks, rings, and cassette. I’m fairly sure it has a BSA BB. As I understand, there are two components here that will lock me into a standard: spindle type (square, spline, etc), and chainring mount (4 or 5 bolt, probably more complicated than that). What standards would yall prefer?

Ive done a good bit of reading about this, but there are so many variants out there that I have to fight an aneurism after a while. I want to get a tad educated before going to the shop.

A bonus question that will open the wormiest can of worms… What level of stuff do you think this frame deserves? Balancing price/performance/resell factors?