So I finally got the stance I wanted (kinda) on my 67 cutlass (going gasser), but I'd like to lower the rear some more. Unfortunately I JUST got it to sit level left to right (with in 3/4") by using a wagon springs on the driver rear, and and stock spring on the passenger rear (BBO wagon with A/C springs on the front with 4.5" spindle lift).

I'm worried of if I go with 1-2" drop springs for the back, I'll go back to having the passenger rear sit 1.5-2" taller than the driver.

Thoughts as to what could cause this?

 

Check your body bushings for rot, or the frame or body being rusted where the bushings sit.

 

Apart from some bondo in the lower rear quarter, car is rust free luckily