Looks like you have a cga monitor there, so only the early megatouch boards
would work with it. Depending on the kind of games and how many you have,
it may not even be worth it.
I wouldn't attempt converting what seems to be a rare dedicated cabinet,
but no one would care considering the type of game it is, so you could
probably get away converting it to mame and running the early megatouch
and touchmaster games on it.