RE: Official E-FIRESTORM thread
I've did that rear arms switching before, but seems like the joints may not be made for such a mod.
In stock form, the front end of the arm joint fits into the truck with a rounded tip, while the rear has a flat surface. Turning the arms around does increase wheelbase, and they do fit OK, but I switch back to stock since I'm not good enough to know the difference in handling, and after noticing the difference in the rounded & flat surfaces.