LBZ owner and former owner of several LB7s. My truck is my tow rig for my drag car. 2007 Classic LBZ crew cab dually. ARP head studs, Pro Fab EGR delete, Y bridge, down pipe, and 5" exhaust. PPE Hot +2 ET tuner that's usually on economy mode. Tows 48' LQ trailer usually running 29-30k. 350,000...