I have a 79 GMC Jimmy 4WD that I have had for over 10 years. In that time I have rebuilt and impvroved the engine, 488 gears, detroit locker in front (was driving every day at that time), six inch supension lift and 3 inch body lift, currently with 38" swampers. I would like to start working on the suspension. Give me some opinions or options to do. Any info will be appreciated.