Did you manage to dump the ROMs? (I understand from your article that article there are 3, a 4KB ROM on the CPU card, and two 8KB ROMs on the word processor card)
I'd like to dump the ROMs, but they are soldered in and covered with conformal coating, so it would be moderately destructive to remove them and dump the contents.
One thought occurs: I assume these are mask ROMs, and so likely unchanged from the AN/UGC-74 original. So, if someone somehow managed to get their hands on an AN/UGC-74, you'd feel less bad about engaging in this kind of "sacrificial" action, given it would lack the unique historical association with Space Shuttle.
Another thought: maybe there is some way to monitor the signals on the ROM pins non-destructively, by picking up the electromagnetic radiation? I'm guessing the answer is "no", at least not in practice.
P.S. You have a typo on the page, at one point you have "AN/UCG-74" instead of the correct "AN/UGC-74". The other three times you mention it, you have it written correctly.
Did you manage to dump the ROMs? (I understand from your article that article there are 3, a 4KB ROM on the CPU card, and two 8KB ROMs on the word processor card)