no... if the engine is running fine, I would leave the MSD box alone. your problem is MOST likely your gauges, or the wiring to them. it's a common problem for them to build up corrosion on the backsides and become erratic. Chances are your gauges themselves are fine. remove the gauge clusters and inspect the back of them - the connector where the ribbon cable connects. if you see any white/green powdery residue, clean it well. also the ribbon cable itself sometimes accumulates corrosion - check/clean that too.
you COULD get new gauges.... if you need an "excuse", this could qualify. but unless you WANT to replace all the gauges (can get expensive real quick) I'd try the cleaning first. once you get em clean, put a light coating of dielectric grease on all the connectors.
[FONT="Comic Sans MS"][COLOR="Blue"]Sean B. - Schenectady, NY - 95 YJ, 350/700r4/NP241, JB Shorty SYE, 8.8 rear, 2" BDS, 1" homebrew shackles, Daystar 1" BL, TJ flares, 35x12.50 General Grabber AT2 on 15x10 Bart D-Truckers, Polyshield polycarbonate windshield, HD over/under crossover steering
[/COLOR] [COLOR="Red"]swap/build thread: [url]http://www.jeepforum.com/forum/f22/after-almost-4-years-finally-my-own-build-swap-thread-1542284/[/url][/COLOR][/FONT]