That's a very generous offer, I'm in Aggieland Texas, so pretty far from civilization.Where do you live anyway? Maybe someone that's done it and/or has the offset wrench is close enough to lend a hand?
The wrench with a long socket extension to bring it up above the engine is the way to go I think. Can't get full rotations, on it, but you can turn it by repositioning the wrench. A lot. But again, without having had to deal with ABC I can't say for sure. Even without ABC the driver side was significantly more difficult.
The top of the mount is keyed to fit without rotating, if I recall. It's my understanding that they are hydraulic, and similarly if you unbolt the bottom of a shock (or motorcycle fork) you can spin it without affecting the top. That's why the bottom will turn.
My local mechanic has generously allowed me the use of his (massive) shop tomorrow where I plan on taking care of a number of other issues that need taking care of.
If worst comes to worst I can put everything back together and figure it out in the shop. One last thing I will try is a long flex top wrench, and if I'm feeling especially insane I will remove the valve cover and headers giving me direct access with a socket.
If someone is located in aggieland and does happen to have the tool, please PM me ASAP as I plan on starting early tomorrow!