OK I figured out what to do. The biggest hurdle is switching between the wheels. I can't respace the SA hub to 135mm (or even 126mm) so I will respace my fixed gear wheel. Its got huge 13mm spacers that take it to 135mm so if I just put in smaller spacers to get it down into the low 120s' then it will be no big deal to respace the frame to deal with both of them. Plus if I do it right I'll have plenty of room to add some pegs to the back axle. Then I'd just need get a shock fork.

Shocks. Pegs.... LUCKY!