Right, it's more desirable to have it a menu choice, I'm just looking at the various options.  It would be nice to have Pac-man as an option since it's a fairly beautiful pac-man cabinet with all of the original parts (bezel, marquee, pristine CPO, etc.)  
In the mid 90s, at an arcade I remember playing a cabinet with different Pac-man versions, Rally-X, I think Galaga... I thought it was like a 5 or 6-in-1.  Sort of like the handheld Namco collections but it was a cabinet.  I looked around but I can't seem to find it anywhere.  It seemed legit and was being coin operated for profit among 100 other cabs, but now I'm not sure whether it was legit since I can't find it.  Does that sound familiar at all?  
Does the Ms.Pac/Galaga board have any option of running original Pac-man as well?  Some kind of mode or switch?
* I see there is a code you can put into the reunion to play pac-man.  That's cool, however, it looks like the controls for reunion require two ms pac start buttons, two galaga start buttons, as well as fire.  I don't see how that would work without drilling into & defacing the CP.  Hmm.  It makes me lean toward the pac / ms pac switchable, or something like that.  Would be even cooler if Jr. Pac was on there also...