Thanks for the input, gentlemen.
The Ridge Racer I want to convert has a 33" arcade monitor already in it. If I crammed a smaller monitor in the cab, it'd look a little odd.
Ideally, I would like to keep the cabinet as "dedicated" as possible to maintain the arcade game illusion. This might be difficult, as the game has NO external switches outside from the 6-speed shifter.
I am planning to build a loom for it so if the day ever comes that I find a Namco System22 board, I can simply convert it back to Ridge Racer with no hassle.
APf