FWIW;
I have these (copied from another thread);
"Use 1986-92 Jeep Comanche Monroe Sensatrac part #37029, which is 14.375" compressed and 23.000" extended. For comparison, stock rear XJ Sensatrac shock part #37027, is 12.750" compressed and 20.000" extended.
Last week I spent most of a day trying to add slightly dropped shackles.
I "may" have slightly lifted springs (replaced the sagged stockers with some that were sold as coming out of a stock 2001 Cherokee) and the rear sway bar has been removed.
Short story; Ended up taking the dropped shackles back off (after cutting bumper bolts for clearance and discovering that the exhaust pipe interfered) because the "longer than stock" shocks were what limited my rear axle drop, not the springs or shackles. For me personally, if a mod. doesn't improve things for my needs, it may not be necessary.