Ditch the trac bars and get sway bar discos or ditch them both. I have 3.5 inch springs, I dont run sway bars or trac bars and I gained like 3-4 inches of flex just removing those. Depending on what brand the springs are they might flex well and might not... I took my flares off and cut an inch off the fender and put the flares back on and it gave me a little more room to twist. A locker will make a huge difference too. Spartans are on sale right now and take like an hour to install.
The night I got it.Thats all the flex it had. Notice the burn out from picking up a tire...
After trim and sway/trac bar removals and rear locker. Same stump, no picking up a tire or spinning and my tire is like a foot higher on the stump...
91 Laredo, 4.0ho, TF999, Magnaflow exhaust, Yukon rear axles, Spartan Lockers, Posi locker, 3.5 inch springs, 1"MML, 1"BL, 1"shackles, trimmed fenders, raised flares, 35x13.50s.