PLEASE HELP ME!! (pick out setup)

[E-Revonut]

Yes a bigger motor will run cooler. Would you put a 2.0L 4cyl in a F-350 Super Duty? A 120HP motor will move that 6500Lb truck easily, it won't do it with any kind of performance, it's be slow as hell and over heat the motor and it wouldn't last long. A bigger motor is capable of moving a bigger heavier truck much easier with less heat and a longer life. A bigger motor is capable of producing the same amount of power as your smaller one without heating up as much because it isn't working as hard, bigger rotor equals more torque, and a bigger can has more surface area to dissipate the heat better.