AC... I have one of these cabinets. If you need any info on them, as far as monitor (Sanwa 29e31s), wiring, lifting the cab into standup/sitdown mode, or anything else, give me a shout. I've got it down to a science.
I got mine for 375, (still a steal, as they should go for 6-900 fully working), and played till I was done with T5. Sold the guts, including ps2 ports, card readers and distributor....basically everything....and got 300$ for all that...so I'm 75$ into one of the best sit down cabs you can find.
I had a buddy who got one as well, but his CP was all black, so I swapped him (he wanted Tekken 5 art), and drilled out the last two buttons.
Added a Stereo Amp, inside the control panel, replaced with new buttons and sticks, and a custom marquee, and she looks like this now.....
http://i.imgur.com/uQ1jYRe.jpg
(Used last name for marquee, had to block it out, sorry...did use Mappy's Broadway font, with the letters in a rainbow pattern R O Y G B, with the purple boarder. Thought it matched the Namco cab nicely)
I have also started art package to turn this into a "Namco Battlestation" cabinet with new marquee, sticker for that space between monitor and CP, and new CPO....but am nowhere near done with it.
Have had Naomi (with second PSU), NG with Gnbes CGA>VGA, the 256 obviously, a Raspi, and right now there is a Pandora 3 in there, which makes it easy for the wife to find Puzzle Bobble, and lets me play 3rd strike, which the Raspi still doesn't handle super well, in my experience.
I have had to rewire a lot, and will help out with stuff any way I can for you!!! Congrats on the great grab. They are amazing cabinets.