As this point I’ve ordered a new water pump gasket and will drain all the coolant I can. I’ll clean the surfaces again and seal those bolt threads with rtv.
Since you're going to have the water pump back off, check the mating surfaces on the back side of the pump for defects. I had one leak on a 6.2 Chevy one time so I had to remove it and reinstall it again. It did have a small burr of some sort on the mating surface. What i did, and do every time I install a water pump now, was to take a flat file and run it gently across the mating surface. Any defects will show up as being a shiny color. Just for reference, it's A LOT more work to R&R a 6.2/6.5 water pump than it is on our engines.
Perhaps I should get it going again tomorrow and let it come up to temp and monitor the radiator seams again before pulling the water pump?
That wouldn't be a bad idea.
Non messy way vacuum fill it if you have the capability.
What we used to so was take an old radiator cap and cut the gasket so that any pressure would go into the overflow reservoir. A radiator cap has two rubber seals. One seals it to the top of the filler neck (to keep coolant from coming out the top), the other seals it to the bottom of the filler neck (to keep coolant inside the radiator until there's enough pressure to push it into the overflow). You want to cut or remove the lower one that seals to the bottom of the filler neck.
For some reason..yes I opened a hot radiator...
If you did this, meaning that the thermostat had opened up, there goes my air pocket theory.
.I was just the a on the normal reading
That reading really didn't mean anything. The factory gauges are even close to being accurate. How hot is "A"? We don't know. It varies from truck to truck. It can also vary on one truck. Sometimes, the gauge readings will be higher than other times. I didn't mount my mechanical temp gauge in a very easy to read spot so I use my factory gauge as a quick reference. I will remount gauges in the future. as hacked89 said earlier, if there is an air pocket inside your engine, it can/will read as a hot temperature on a gauge. This is because there is steam that is touching the sender. Steam will almost always be hotter than the coolant is.
You aren’t going to leak coolant out of the four permatex holes you are going to leak oil.
I had forgotten this one detail. Thanks for the reminder.