1mtx1

Hi everyone i picked up a used but in ok shape Team Assocaited 18mt truck that has seen some mods such as only a dean plug from the esc and the hobby store threw in a used battery that had a dean plug put on. The truck has some new on road Losi tires and ugly yellow wheels lol as you can see nothing over the top. Before i jump in to spending more money on this i have a few questions please. I really want to know what was the stock pinon gear that came with the motor and spur gear that came with the truck? Just in case i want to or have to replace anything in the hopes to gain speed on the stock motor with out changing out the stock electronics . My last question is can i use the rc18t parts with my mt? I saw everything can be used but the bodies/tires so i assume all the other parts are fair game to order?