Originally Posted by Chombi

Look in Sheldon Brown's site and he has a good list of cranks and typical spindle legnths for them to at least get you in the ballpark. Some BBs also have double adjustable cups (no fixed cup) to let you move the chainline left or right a little to ge your chainline close to perfect.
My French double cranks tend to typically need 118mm spindles. The Shimano DA7400 double crank that came with one of my bikes I bought last year was at 113mm. I'm thinking that your Sugino triple might need a 118 to 120mm? Again, check around, the internet can be your friend for information.,

Chombi