Need Help With My Electric Truggy Conversion!

Mike (RC Monster) could probably make you one, if he doesn't already have one drawn up. That, or you could make one yourself. I've made quite a few of them and it isn't super hard.

As for the gearing, it depends on what motor you go with. If you go with a 1700kv motor, I'd say a pinion in about the 14T to 16T range with a 46T spur gear. As for the motor, that will also depend upon your chosen controller. If you go with a controller that does four pole motors well, then it's easy. Get a Neu. For a truck, the 1515 2.5d is probably as good as it gets. Either that or the 1512 1.5Y or something in that range. If you go with a controller that doesn't like four pole motors, then the Lehner would be the choice, but good luck finding one.

For a truggy on a track, I like the 4S lipo packs. They are a good compromise between power on tap and weight. I run the maxamps 4S2P 8000mAh pack and have had good results with it.