sorry, not to hijack the thread, just didnt want to start another shim thread.
how do you figure out what shim you need? or should say the easiest way?
i have 10" Superlift springs, move my shackle mount back like in the Tech Section, and added a set of DIY 6" shackles.
my pinion is approx parallel with the ground with my Dana44, so when i swap in my Dana 60 im assuming thats not going to change and i would still need to correct that, right?