Was doing some work on my truck today. 99 xlt 4x4 Scab, put in some NGK platinum, changed over from autolite platinum, this got rid of my miss, yeah! Also decided to go ahead and level out my truck too, so i took my measurements and drivers side rear is about almost 1/2 inch lower than passengers side... I went ahead and turned the bars exactly two full turns and got it matched up with the passengers side... Why is the drivers side rear lower? How can I fix it?

 

Weight of driver and gas tank

 

That makes sense, I have about 3/8 of a tank... You would think they would compensate for that...

 

Well i believe the drivers side is tighter from the factory to compensate. I know when i measured the original torsion key threads they were a 1/4" off