Join Date: May 2001
Location: Saranac Lake, NY, USA
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You can use a shorter bottom bracket on the front with no functional chainline issues.
However, you do need to use a bottom bracket made for a 73mm shell on the Santana.
So, a 73x109 or a 73 by 118.5 (using your two examples)
BTW, before going to the 109, I'd eyeballt the current clearance between the crank and the eccentric to make sure there is over 1cm of clearance on each side, or else the crank will tighten touching the frame