Cam/Head Swap Disaster.......

Woah! I am feeling your pain on this one... Drain ALL the remaining coolant, including the side plugs of the block, and the oil. Flush the crankcase out with whatever you can get to get as much water as possible out of it, and get just enough fresh oil and a filter onto it to run a compression test without seizing it up. This will at least give you a starting point to go from during the diagnosis.