In reference to your staying centered in the lane (or something like that) statement - Also remember that 37 inch mud tires are going to wander a bit while on pavement. That's just characteristic of the tire, a solid axle set up, and the wide track width.
I also agree the "pulling to one side" is the stabilizer though. Some MT tires pull a little too....doubt this is the main reason though.
And.......maybe it's just the first photo but it looks like a lot of extra grease on your lower drag link ball joint. Just make sure that boot isn't torn already and your shop just put that much in where it squeezed out.
Clean looking JK! I Like the wheels!