I did some more reading and picked up the cabinet anyways since it was just my time to grab it. It's a Super 4, and appears to be in fine working order except for the touchscreen glass itself which is damaged, and R1 on the remote board for the monitor smoked out some time in the past. Display is working fine though I suppose adjusting the brightness it out of the question. I guess I'd need to understand a bit better why that happened but replacing a resistor is easy enough.
My understanding of everything XL and up is that they drive VGA monitors, and this cabinet is CGA. While not impossible to convert, it would not be plug and play, and may not be worth playing around with.
It may be better at this point since it is in otherwise general good condition to repair the touchscreen and have it for what it is.
I'm still interested in any experiences or thoughts on retrofitting this cabinet as I do want the XL games, and it doesn't hurt to entertain the idea.
Apologies for the first post I was in the middle of a few things at work and I didn't devote enough brain cells to writing.