My '91 YJ currently is running on 35s with Dana 30 and 35, 3.55 gears and SOA. I just picked up a ford 8.8 with 4.56 gears and a Detroit tru Trac with only 20k miles on the gears and Tru Trac for a very good price. My shackles are +2. When I swap out the rear, I should change the rear shackles to +1 to keep me level right? Thanks for the help.