I personally would pretty it up and leave it as is. Moon Patrol is more common than Vigilante, which is a fun game anyway, and that cabinet has good sideart, rare for a conversion game.
In general I don't reccomend "unconverting" good working conversions with full artwork, save the unconversions for the deaed stuff, or the stuff with half the artwork ripped off.
Basically, if you unconvert that thing you will be minus a perfectly good set of Vigilante sideart, and a Vigilante control panel, and that stuff is not reproed, and that "kit" you pull off the cabinet isn't going to fit anything other than a moon patrol since it has already been cut down to fit one.