my question is if going through all the effort to do the sas, why would you want to have stock gearing? even with 31's the stock gearing is making power suffer.
that being said, the amount of work a sas is, is it worth it if you only plan on stuffing 30 or 31 inch tires under there?
if it is only because you dont want to change the rear axle, i would say the rear axle is the easy part.
either way a cool project none the less.

2000 SPORTY, DEF BOY customs, mmm....lockers, mmm... gears, mmm... double transfer case, mmm... stroker