Sorry for the extreme delay in posting. Installed duo valve. Turns out previous owner had removed thermostat. BAD. Overheating was caused by failed aux fan, which blew fuse on relay located behind fuse box, casuing neither fan to operate. Also by not having thermostat installed. Over heating problems solved.
Heater Fan blower problem caused by regulator. Replaced it, problem solved.
ALso repalced Mass Air FLow, which helped idle. Now have poor cold starting. Perhaps it is the Engine Coolant Temp sensor? Hmmm.