If the lifters were replaced, were the rockers and push rods replaced too? How bad did the lifters look? If they were installed properly and torqued right they do not get adjusted again, these are hydraulic lifters. What you are hearing just might be rod bearings or wrist pins. Listen while idling under the jeep, if its louder there, its probably not your lifters.
2013 WRANGLER SPORT 2 DR., V-6 ,AUTO,HARD TOP
)1994 Jeep Wrangler 2.5L, Bestop top
/w steel half door and slider windows
5 speed, 2.5" lift, 31" tires,rack lights