Maybe I am making the question more difficult than it needs to be. So I choose a wheelset, which will have some chainline, and I need the same (or close) chainline up front. That is determined by my crank/chainring/BB length. I get that. My question I suppose is that given my frame, how do I know what BB's will and won't be compatible?

If I look on www.thebikebiz.com for example, I see the Sugino RD crankset, and they recommend a TH7420 BB with it. If I assume that the chainline will be appropriate since it is a track setup, that takes care of that question, but how do I know if that BB fits my frame?

Thanks in advance, I know this is simple.