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Got the engine running today and it heated up real fast. The heater hoses were real hot but cold water in the radiator. Ye wreckn' the thermo is frozen? Please don't say water pump. I could be though. I replaced some heater hoses and lost the coolant out of them. Filled the radiator with about 3/4 gal of water. Fired it up and well.....
is the upper radiator hose hot?
is there a particular reason why you haven't tried pulling the thermostat and running straight through? it's just two bolts and some rtv.
this will allow you to see if you're getting flow from the pump. if you've got flow from the pump, go ahead and get a new 'stat. they're only a couple of bucks.