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Although it looks like there is a lot of room, there is not enough to maneuver one of those wrenches.
Amazingly, however, I just discovered that Sears makes a product called a Max Axess socket set, where both the sockets and the drive are hollow. They appear to make nothing longer than a 3" extension and I need about 12", but I'm hoping I can stack the extensions.

http://www.sears.com/craftsman-19pc-universal-max-axess-socket-and-ratchet/p-00931088000P?plpSellerId=Sears&prdNo=3&blockNo=3&blockType=G3