UPDATED PICS ADDED: HEre is a newer version of the gearbox including fillets since it will be made from plastic. THe deck you see on top is for mounting a CC Mamba MOnster. It has slots for zip ties built in. The deck is removable, and other versions for larger ESC's can be made.
Based on FLM tvp's, so the motor/ esc deck will end up where the stock reciever box goes. If you want to keep the recieevr box, you can drill new mountin holes and mount it the other way (so the motor is at the rear).