This isn't an answer, rather it's a question for the others: What was the consensus on the necessary brew to pour into cylinders to get them freed up? It seems to me that it was a mixture of ATF and something else, but I forgot. My 6000 appears to be stuck as well. It supposedly "ran good" when it was parked, so I'd rather not disassemble the engine if I don't have to.
To 59chevy36: I wouldn't put any more torque on that crankshaft bolt than you already have done. What I might suggest though is prying on the ring gear teeth through the starter hole. You might get a little bit more leverage that way.