Okay,,,back to post #1 .
The radiator is hot at the top but at the bottom it’s cold to the touch .
There is not any flow through the radiator then .
So,,,it’s got to be a clogged radiator,,,or a blockage in some passage in the system .
But, you said you removed and cleared the radiator of possibility .
If you remove the water pump,,,you can look into the block past the timing cover .
There should be a little flow through the pump,,,even if it’s not working .
Is the opening in the water pump clear,,I have heard of those being installed with the plastic plug left in place ?
If that’s clear,,then it must be in the intake passage or thermostat housing area ?
Water should be able to flow some even by gravity .
Take off the thermostat,,,,and the water pump .
Take a hose and run water through it .
If no internal blockage,,,then water will gush out of the timing housing .
Tommy