Shocks do not clunk but they get spongy. In other words the ride starts to feel as if you are in a 1975 Cadillac. However if the upper or lower shock mounts are loose then it will clunk. So look around you may have a different issue that you may to fix first.
I cannot comment on the lift stuff but many others here can.
94 Black Laredo 4-Liter with QuadraTrac (42RE trans & NP249 TC) 200,000 + miles purchased new
88 Cherokee 2-door with 5speed manual 139K miles(deceased) purchased new