When I did the research for this possibility for my 2.5 I found that the performance cams (including the Clifford one I think) attempt to increase hp by increasing overlap (the amount of time both the intake and exhaust valves are open together) which raised hp at the higer rpm range. This usually decreases torque at the lower rpm range since adding overlap kills some backpressure. This is the typical performance cam approach because most performance auto applications are not concerned about torque but need more hp at the high end to increase top end speed and quarter mile times. But the 2.5L in the Jeep is right at the minimum usable torque that can even get the Jeep going, and in my experience you notice any loss of torque at the low end as less power, less drivability, right away. But you don't notice much advantage in a little extra hp at the high rpm range like you'd notice it in a V8 application where you have plenty of torque and need more top end.
What I learned is that a better performance cam upgrade for the 2.5L was what is called an RV cam--a cam with lobes engineered to increase backpressure and low end torque at the slight expense of high rpm hp. There were good reports from several 2.5L RV cam installs on JeepForum and the old Fourbangers united forum. I haven't gotten around to this install but it's one of the few things I'd consider for the 2.5L based on my research.
Edit: just read your YJ forum thread and it sound like the Clifford cam is a torque emphasizing RV cam design. Will have to look into the Clifford.
2000 2.5 TJ, 5spd, 33s, 8274