LOL, gotta say, coming from a lot of LT1, LS1, and Vette forums from way back and over the years, it is funny as hell seeing so many Jeep people on ALL the Jeep forums I checked out freaking out about engine mods and warranties not to mention folks having their mind blown when someone says they go over 3500 RPM and how it is bad for for the engine, like Jeep making the redline so high was just a lie.
I would just take a look at the Charger and Challenger guys running the 3.6's on the car forums and see how many are doing what to it and how many are banging it off the rev limiters several times a day or running boost or nitrous, big bores, strokers, or even poked and stroked with forced induction or nitrous with no problems.
Now I know I'm new, unveted, unkown, untrusted, and have no history of Jeep experience and advice giving, but drag racing used to be my thing with doing any mod to make it faster on any car, street bike, dirt bike, quad, or snowmobile. A small supercharger is not going to hurt the 3.6. Is it going to put power where it needs to be on the trails or crawling? No, not really, but big hill climbs, sand, and driving everyday on the road? Hell yes!!!
The irony that makes me laugh so hard is folks with $8000 to $12000 in tires, lifts, and axles going out snapping, smashing, bashing, and breaking u joints, axles, and gearing all day worry about a $200 to $800 piston, piston rod, bearing, or crank job. Fear of the great unknown I guess. I worry about all the suspension stuff no one gives a second thought to here. Could care less about engine problems, cause I know one and not the other.
To the original poster from a former drag racing gear head: Put it on, enjoy your sweet sweet boost, watch your A/F ratios for a while to make sure you have a good tune, and try to watch your knock sensors or timing to see if it has been retarded enough along the full map for daily driving. Any knocks or even seeing timing being pulled from normal means too advanced, too lean, or both. I'd recomend a real tune vs a generic program to dump in it. After a few weeks of daily driving a follow up tone to make sure the fuel trims are happy.