If you are running 30* in the timing, you are pinging and you are going to eat a piston. If you are 30* and not pinging, I'm thinking you harmonic balancer has shifted and not indicating correctly. Mine pings around 11 or 12, I normally run around 8* on the timing. You are probably over carb'd with the Holley if that is really a 232. The 81 Jeeps should have a 258 stock. Your sig says 33" tires but you actually have 235/75's which are closer to 29" which helps in your case. Honestly, your biggest problem is the gearing. I don't know if I have anyone ever say they like the way their Jeep performs with 2.73's. Do the normal stuff, get a better carb, check for vac leaks and make sure you don't have malfunctioning emission components. Make sure you don't have any blockage in the exhaust stream, like a broken up and melted cat from running too rich. And don't let it ping, bad things will happen.
1986 CJ7, 4.2 w/4.0 head, TFI-HEI hybrid ignition, Clifford manifold w/Holley 390 w/cold air intake, OBA, 4.5" lift, Woody CV shaft and Tattons in front, 4.10 gears - lunchbox in front, Truetrac in the back, twin-sticked, blower upgrade for running topless, trying to keep it simple.
It's just a Jeep, and if you don't wheel it once in a while, it's not even that.