Where is the best place to start if building a TDC57/Jordan style GorillaMaxx?

[SV6000]

If you wanted to lengthen the G3R i would suggest getting the alloy version as all you need to do is make a new top and bottom plate from a piece of alloy. You could do this at home with a jigsaw and a file if needed. You would also need to get a longer rear drive shaft to fit. The standard EREVO rear driveshaft would work well as it can extend a fair way. I dont think it would handle being extended and brushless very well. As far as the tranny goes you could always run a center diff and make a custom mount to fit