[MENTION=545141]5mm[/MENTION]

Spindle lengths are specific to cranksets, not bikes. Here's Sheldon Brown's list of Sugino cranksets and the needed spindle length. Sheldon Brown's Bottom Bracket Size Database

Are you sticking with the Sugino? If so, go with the Sugino spindle length and not the Shimano since the chainline is determined by the driveside crank arm and not the non-driveside (NDS). Caveat: If you are going to keep that Shimano NDS crank arm, measure the non-drive side of your current spindle to make sure the new one that you eventually get is not too short. You don't want to install just to find out that your NDS crank arm is hitting the frame.

Oh, and pics please.