you are just ovely concerned with heat. Not saying the truck has a ventilation issure but at the same time, there is nothing but space and air under those bodies. look at i believe it was prolines website, they have a fancy video showing the turbulenc and air vortex you get inside a old, non high flow body. thats gonna cool the motor right there. most motors, 180 is your danger number. 160 is pretty good and 170 175 is where i would start getting concerned with my reedy motors. Like I said, I talked to LRP and they said that the x12 motors have a bit better temperature accepting magnets in there motors.