After doing the 1" body lift on my 97, i decided to measure the distance from ground to fender flare just for the heck of it. The driver side front sits at 35 1/2", the other three corners are at 36". Is it normal for the driver side front to sit 1/2" lower? I didnt measure before the body lift, but i'm sure that corner would have already been half inch lower. Keep in mind, the suspension is still stock with 113k miles on it.

 

It is possible, because the gas tank is on the drivers side. The weight of the tank could have caused that side to sag more than the other over the last 10 years or so.

 

No, its not caused by the body lift. Either you think your on a level surface, when you're not, your suspension wont be exactly on target, and the numbers you posted are pretty much exact. Suspensions do not keep the original height or ride for ever, and I doubt they are exactly perfect even off the assembly line.