I have 1-1/2" front and rear on my truck from Roadmaster, the rear is from the EV package and had to rotate it and add an extension to one side.
With the longbed extended cab the body roll or what I thought was body roll was frame flex. Soooooo I bought a used under bed B&W 5th wheel hitch, added some extra bolts and that took care of the frame flex.
The truck used to be a little uneasy at 100mph, after installing the hitch and coming back from Wikenburg last month I passed a semi and looked down at the speedo and was cruising at 120, whoops....
I have a set of McGaughys spindles to maintain the stock front geometry not installed yet and a set of 2" drop hangers at the front of leaf springs and shackles that'll give me about a 2-4 drop and be done with the suspension other than rebuilding it at some point.
Adding about 300lbs near the tailgate also makes a substantial difference..