I would replace the track bar with a DT or equivalent if *any* amount of lift is used (JMHO). The stock track bar is a weak unit and is begging for upgrade. When lifting our trucks, the stock track bar will pull the axle to the driver's side of the truck. Having an adjustable track bar will allow you to re-center it.
Daystar makes 2" lift spacers as does Jack-it. For about the same price you can get Skyjacker D25 replacement front coils, just another option.
Hope this helps. I'm not affiliated with any of these companies.
Duane