Raising one side of the body

My drivers side rear end is about an 1.5" lower than the passenger side. I think at the fender it's about 3/4" higher

You can kind of tell here, the fuel cell is mount perfectly square with the frame, you can see a bit more fuel cell on the right than the left

How much does a shim raise the body?

Check the condition of the body mounts first.

I noticed the crooked fuel cell when you first psoted the pic, I thought you had it mocked up in there.

It's usually the drivers side that sags first.

Here are the pics

try measuring your frame height at different places along the frame on both sides.....you might also throw some weight in the seat to compensate for you or even better would be to scale it, hopefully your cousin has a set of scales....and he likes you enough to help you.
redvetracr

I measured different parts of the frame and they are all square

That part after the body mount at the rear most part is off 1/8" though but that really is irrelevant

It was hit in the rear at one time, but it was minor and just messed up the body a bit

I've been wanting to scale it for awhile, I could ask him if we could bring it over sometime, there are some other places I could bring it also