Green machine.... For gear ratios, I believe 18/66 is stock, so probably work from there with those 600 can motors- probably get away with larger pinions though I bet.
absolutly beautiful, nice truck man those motors are pretty good actually a friend of mine has them in his emaxx and it i goes for a brushed truck, he runs 58t spur and 18t pinions if i am not mistaken (32p).
mike has 12t to 25t mod1 pinions here - and depending on the shaft size of those motors, you would probably need the bore reducer as well with each pinion.