Maybe I'm missing something. I don't pull trucks but have been pulling tractors for 30 or so years and have watched a lot of trucks pull. All the pro trucks are so light in the rear if they burp the throttle backing into the sled, the rear wheels come off the ground. Many even have "wheelie bars" under their front weight boxes. That tells me that with 4WD you want as much weight on the front as you can get. The sled gives you all you need on the rear and the further out front it is the more leverage it has to lift up on the front of the sled. Take off your tailgate and rear bumper so you can hang another 100 up front.