Flushed the heater core and got heat.
Took 15 minutes. Tapped a gallon or so of coolant from the radiator spigot. Unclamped the coolant hoses at the firewall nipples and flushed garden hose water thru backwards (flush water went in the passenger side nipple). Some milky crud came out but not much. Ran water til it all came out clear.
Then I decided to flush the whole system, removed the radiator cap and ran hose water thru the same heater hoses to the water pump and let it clear out. Refilled w glycol.
...no water on my carpet..
...On the plus side the heater worked great afterward.
Thanks all.
- Art