How many times have you heard the "leaky head gaskets" problem???
I would bet money it needs a LIM gasket replacement. Replace the other gaskets while your in there and I bet it would be golden. Hardly runs because I bet it getting coolant into the cylinders and motors don't run well on 93/Dexcool mixtures.
I would start at $1000 meet at $1500, put $200 in gaskets in, flush the coolant, service the trans and I bet she runs like a raped ape.