Closing report–- I believe that the difference between my cab & box was based on 2 factors: - the damaged coil springs that were torched by a previous owner, one (drivers side) being lowered/ ruined more than the other - the difference between the 2 rear cab mounts.
As shown earlier in this thread, the drivers side shackle assembly looked much newer and otherwise different from it’s partner. I have to conclude that the newer looking unit was not to spec. Measurements as per recommendations offered here supported that conclusion.
Coil spring replacement improved the leveling of the cab. Before the spring swap the difference was approximately 7/8” ; after swap 3/8”. Yesterday I dropped the drivers rear shackle and after loosening the other mounts I put in place three 1/8” shims and , ta-daaa - good results.
That differential has been annoying me for 2 years. Yesterday was a good day.
Thanks for holding my virtual hand and for the input. I learned a great deal from it.
