I have a 1980 Cheyenne where the front right sits approximately 1” lower than the front left. All cab body mounts have been replaced including the radiator mounts. New coil springs. All front end suspension work has been completed. New shocks. The alignment checks out completely. It drives straight as an arrow. But it just makes me crazy that it sits a little low on one side. I have recently added 3/4” worth of washers under the front right radiator mount, and now the body sits straight, and even a bubble level shows it is sitting correctly. But the front bumper is still Approximately 1” low. The front bumper attaches directly to the frame, so I had the frame inspected. The frame technician said all of his measurements, when comparing the left side frame to the right side frame are very close, with the exception of the right front, which does appear to be approximately 1” low. But I’m not entirely convinced that is the issue. He did his measurements with the truck sitting on the tires, and he also did measurements lifting the truck off the tires to take the suspension out of the equation. I did my own measurements of the frame using the 1980 shop manual specifications and all of my measurements are about 3” lower than the shop manual numbers, but all Left/right measurements are very similar. The right front is a bit lower, but not a full 1”. The frame does not appear to to be twisted in any way and there is no visible damage anywhere along the frame rails. I have now removed the front shims from the cab mount and I am getting a 2nd opinion from a different frame shop. At this point I’m at a loss. The only thing I can think of is the truck was shipped last year from the Pacific Northwest to Texas. The transport driver used chains to cinch the truck down using the frame as a tie down point. The trip took 8 days and my pickup was loaded at the very back, and top, of the transport vehicle, and was tilted down on a 30 degree angle. Is it possible the transport driver over tightened the front right chain on the portion of the pickup truck frame that attaches to the bumper. And the torque of the chain, the downward tilt of the truck, and an 8 days trip bouncing up and down all the way could have pulled my truck frame down by 1”? I’m open for any comments and/or suggestions anyone might have. People have told me to just leave it alone and just drive it. It looks good and only I notice it. But it’s making me nuts. Thanks.