I won this on eBay this morning:

http://cgi.ebay.com/ws/eBayISAPI.dll...ory=13716&rd=1

I'd like to convert this back to whatever game it was originally...

I know the current game is Ninja Gaiden ( :P ), but does anyone have any idea of what it used to be? It's obviously not an original Ninja Gaiden cabinet, seeing how the marquee looks to have been sawed down to fit. I've read of people having Ninja Gaiden in converted Joust, RoboTron (about 5), Karate Champ and Moon Patrol cabinets, but this one looks nothing like those four's original cabs, none of those seem to have those three speaker "vents" above the screen.

You think this is just a basic jamma cabinet? I know very little about arcade games as you can see. Contacting the seller was no help...