This is my first day on the forum, and I've read the Gen 3 FAQ, little else. I have an '03 2500 Quad Cab with 8' bed, 4WD, 400k plus miles, used for several years delivering 'hot shot' loads (under 26000 lbs.) with a 25' gooseneck trailer. Truck is mostly stock. I added a PACBRAKE exhaust brake...