I had a 76 camino for about 8 years that I just loved. Put a short rod 406 in it in front of race ready TH400 and it was awesome. Only thing that bothered me about that camino was that it leaned three quarters of an inch low on the passenger side back. I changed everything over the years and could never get it level.
One Saturday, after about a million beers, my friend said it was probably built with a lean. Next day, after the aspirin kicked in, I got to thinking about what he said. Next weekend, I put the car on level ground (used a 6' level) and then up on jack-stands under the frame rails. I made sure the body was level and measured from the ground to the bottoms (tops?) of the back spring pockets and damn if the right side wasn't just over an inch farther from the ground. Measured several other places on the car, left side to right and every other measurement came out the same, or damn close.
Took one of the brace plates (or whatever they're called) from my Harbor Freight 2 ton press and put it on top of the back right spring and lowered the car. That baby sat dead even for three years until someone ran a stop sign and I T-boned em and totaled my baby.