I agree with HotWheelsBurban the 342 is good for highway and some towing here and there. You already having one already is good too. Only reason I would want a 373 is because I did a lift kit and I got bigger tires. So i would like to compensate a little. Not interested in a 410. I dont want mileage going down the drain and this truck is not towing everyday all the time.. but having 342/373 I good for every now and then