Rick P, Snap-on makes a 3/8 drive ball-end LONG socket that is 5" long, and with a 3/8" drive extension should fit up through the stack for the bolt. An alternative is a simple 1/4" socket on a long 1/4" extension and an allen-bit for a 10-32 socket head bolt on the end. The allen size is 5/32" and they are available everywhere. Try to get a 1/4" x 5/32 allen socket and just use a 12" 1/4 drive extension and ratchet handle.