OK I had some time today and I did the flush and I installed a new fan clutch. The old clutch was twice as hard to turn as the new one.
I took the thermostat out a couple weeks ago and added some flush then. I drained the rad and idled the truck until nothing came out then I added 2nd flush and distilled water. It was full at one gallon!? I kept it idling and after a bit drained it pulling the plug all the way never shutting it off and revving it occasionally. Put the plug back in and added more distilled water. after 3 gallons I used the hose and filled drained several times until the foam from the flush went away. The dash gauge was working and temp never went past the first mark. Then I did two more gallons of distilled water. I put a new fitted upper hose & thermostat in, there was no water or coolant to be seen when I opened the housing. I started it up and added a gallon of 50/50. I let it idle and went to do stuff. It died while I was watering the garden and I restarted it when I was done watering, but it did not seem to need any more coolant?! The temp gauge was up to almost halfway after I put the thermostat in. I felt the air in the heater and it was not as warm as it should be, barely as warm as it is outside. I stuck my fingers in the box and it was much hotter to the touch on some parts and on the passenger side even hotter to the touch like I expected the air to be. ??? It was not too hot to hold onto as I would expect it to be.

The heater not making the air hot bothers me as does the fact that it only takes about a gallon of liquid in the radiator when specs say it should take 9 quarts or 2-1/4 gallons. I expect there to be residual liquid in the engine but 5 quarts!?

I also put in a new distributor today. The coil is a few months old. She idles nice now with the new carb. I used geezers ear tune method revved it and turned the dist until it was on the edge of missing and pulled it back a tick. I did that before I started doing the flush.