The Firma 85a escape are WAY WAY WAY to small for a truck to that size. I personally would go for either a HW Max8 G2 2250kv motor combo, or, the Castle Creations Mamba X e-buggy edition with the 2200kv motor combo. Or, you could go smaller and get the HW Max10 G2 140a combo with the 2500kv motor.