These things are so notorious for saggin'. They are true "saggin' wagon's".
I put 2 to 2-1/2" lift springs on mine and it lifted the jeep about 4 to 5 inches higher than it was. Granted, my stock front springs had broken main leafs and the rears were separating from each other.
Consider 2" lift springs. These Jeeps look awesome with the 2" lift and stock tires. It just looks right, exactly how they should have left the factory. In stock forms they are low riders (as a 4x4 JEEP) and even with a 2" lift, sit lower than most stock 4X4 vehicles.
1990 Grand Wagoneer-"The Crapwagon"
AMC 360, TF727, NP229, 3.31gears, 2" lift
Rancho 44044, Rusty's 2" AAL, TFI
...not too rusty anymore
Plenty of patina
1926 Dodge Brothers Business Sedan 212 I4-CRANK START
1987 Lincoln Town Car Signature Series-5.0 AOD (WD)
1987 Dodge Dakota LE 3.9, A999, 3.90 gear (DD)
1994 GMC 'Burban 5.7, 4L60E, NP241, 3.42 gear (DD)
2001 Jeep Cherokee 4.0, AW4, NP231, 3.73 (limbo)