Thanks for the interest. Your customers will appreciate the little extra in dealer prep and will help a great deal with overall customer satisfaction.
You got the air filter and the a-arm bolts. Some have had issues with steering stem mount bolts and u-joint pinch bolts. Also, many of the 53s rear lower a-arms have an extra hole drilled in the tube that face the welded tubes that head to the knuckle. This prevents grease from reaching through the bushings and just fills the a-arm. If your tech greases these and can't get any to come out the bushings, this is the problem. I had to plug mine with steel caps. Also, my brake disks were covered with I think was an anti-rust coating my dealer didn't clean off. This made for near-no brakes until I cleaned and the pads wore off that was on them. I also had an issue with the adjustment of the shifter. The detents on the console were out of line slightly with the transmission's. An easy adjustment. Some have mentioned loose rear gear case mounting bolts. Many including myself have has to adjust or replace the exhaust springs as they are set too loose or weak.
I'm sure others will chime in.