If gearing won't solve your problem, sell it and buy a 4.0 TJ. Kalifornia is a pita in regards to engine swaps. Has to be same or newer year and cleared by a referee. There is certainly more to it, that is the info I do know.
As you found out, cold air intakes, throttle body spacers, etc, don't help. A regear could help restore lost power by keeping the engine in it's power/torque zone. What size tire are you running?