if memory serves, Miro's DC30 and plus had no tangible hardware differences; only in the software bundle.
Miro was acquired by Pinnacle some decade ago, so you might want to see if you can dig up something there.
Workstation card costs considerably more than an SSC. Unless you're bend on setting up AppleTalk in the house and booting your system diskless, I don't see a reason of keeping one in ANY box. You'll need to quantify what constitutes "a fortune," as most RAMWorks cards I've seen are quite economical.
if we go by the way cars are painted, you might want to strip the whole thing before you start. otherwise the peeling original paint would just ruin the new paint job. I don't think the cases were primered.
I was going to suggest picking up a 64k Aux RAM card with socketed RAM to harvest parts, but a casual glance on fleaBay seem to suggest sellers are all under the influence of illicit substance...
actually, I've never seen or heard of a 6342 (nor can I find a datasheet for it.) so at the risk of offending, are you sure you read the numbers correctly?
that's not oil. it's the rubber conner used as gasket to seal the drive. over time the stabilizing agent evaporated and the rubber reverted to its natural state...
because that port you're connecting to isn't an RGB port. It's a contraption called "video expansion" unique to the IIc/IIc+; that, with additional hardware, an RGB or similar signal can be created to drive an external display.