Let me back up a step....

I bought the car with the current setup installed, I am willing to ditch ALL OF IT so I am open to a complete package, all I plan to keep for now is the Yukon 3.91 8.75 rear (which is brand new from Dr. Diff). Tires, shocks, springs, etc. are all open to suggestions, BTW, car weighs 3,400lbs.