Okay I plan to use a f-350 dually as the base rig. what modifications should I do to make the truck two a big toy huller cross country yet get good mileage and nice ride quality with out hurting it to bad?

 

First off, need more information on the truck, engine size-type, trans, gear ratio. Second the length, weight of the trailer. What does the front of the trailer look like? Big, flat area is like trying to drag a sail.

 

Yeah,

I think more info is required. If you don't have the truck yet, then it is best to start with the toy hauler. Make/Model/Spec's and then we can match the truck to go with it.

 

I just have the frame and body for the truck,but it an 2003 on jack-stands

 

In that case, I'd go with a 95-97 Cummins BT 5.9, 6 sp manual trans and Ford, duel rear end with the 3:54 gears because it's a straight bolt in. Tweak the cummins just a bit and it will give you good power, mileage and work well with a 6 speed and higher gear rato. The over drive in the 6 speed will help with mileage also.

You could also go with a roadranger like a 6610. They have already been mated to cummins so no after market adapter is needed. Only have to have the drive line mated to the rear end.

 

Thanks and this tweaking of the Cummins would be what

 

Several things you can do with the Cummins. Injection pump is a P-pump, there are after market bolt on parts to up the power. Injectors can be changed, turbo tweaked or swapped. The Cummins can make impressive power and torque and still remain a reliable power plant as long as you don't go overboad.

The reason for a Cummins is money vs end product. To get similar performance from the International engine, you would have to have a powerstroke which would mean computer and wiring harness to go with. If you had an inexpensive donor truck, it would only be labor intensive. 94-97 Cummins makes good power but doesn't need a computer or the sensors that go along with it. Plus the Cummins was put in many mid size trucks, using many different transmissions which gives you a lot of options.