Glad I saw this thread.
Why couldn't Dodge put the fuel tank and battery on the right side?
I had a '91 D150 with the lean. I installed a new left coil spring, no change.
I need replace the UCA bushings on my '84 D100, it also has the lean. When I do, I'm cutting a half coil off the left spring like VL21 did. Might even drop the front a bit and cut 1.0 coil right, 1.5 coils left.

Now if I can only find the best fix for the the dreaded upper drip rail rust.