[xcntrk]

Not sure if this helps any; but the Gorilla max single speed conversion still uses the same (stock) output shaft, so there’s no change in the length of required F/R center-shafts whether the tranny is stock (2-speed) or converted (Gmax) single speed. That said; anybody with a Emaxx tranny equipped revo can probably tell you which rear shaft they used.

Good luck…