I have experienced Raptor lean ever since I did my shock rebuild and installed Deaver +2's back in December, which I didn't have before the rebuild/Deaver install. With my chase rack and some gear... about 250lbs in the bed I measured the passenger and drivers side from the ground to the center of the rear flare. It was around 44.5" on the passenger and 43.25" on the drivers side. The lean was noticeable.
I made a mistake with going with +2 instead of +3 and corrected that issue with Deaver a few weeks ago by re-arching to +3 with a load leaf. I still had the same amount of Raptor lean at 45.5" and 44.5" and Deaver arched 5/8" more on the drivers side that made little difference.
Over the weekend I was at the ROC shop where we did a Flutter Stack upgrade to my shocks. All four were removed and upgraded with the ROC Stage 1 build. After the shock re-install my Raptor Lean was practically gone.
We now believe the shock pressure was off on both rear shocks, especially the drivers side. After the shock rebuild back in December I had a small leak that was fixed a few days later. The pressure gauge at the shop was dropped and the housing was cracked. Could that have led to charging the shock with the wrong pressure?
Anyway, with both rear shocks charged to 250psi in the rear with a full tank of gas I show no visible Raptor lean. After a day of fun in the desert my rear settled a bit at 44" pass and 43.75" driver.
If I were you I would check shock PSI.