The upper hose goes to the block and the lower hose is connected to the thermostat. Also not sure what temp thermo I got. I just asked for one and the dude gave it too me. I should have clarified the temp, but didn't know what operating temp thermo to get off the top of my head.
I just test drove it again. Seems like it wants to overheat more when slowing down or going down hill, not too sure. When the heat does spike up, the heater blower reduces a little bit and engine bogs down a little.
After I parked and idled in the driveway, it stayed in the hot. I felt the upper radiator hose and it was not too hot to the touch, I could keep my hand on it without burning it. I could take the radiator cap off without it steaming or boiling over. The lower radiator hose was cool as usual. Hoses had pressure until I took the radiator cap off, relieving pressure (which felt too high for me).
Since it was overheating on the gauge, I shut the motor of and let it sit. After a few minutes of sitting, the upper radiator hose got really hot and the coolant started to boil.
I wonder that since the upper radiator hose wasn't too hot, the radiator wasn't overflowing without the cap, that pressure in the upper hose was maintained until I took the radiator cap off while running, that the thermo was stuck shut, not allowing the coolant to flow through the system. Would this cause the upper hose to stay warm and not hot because the coolant was stuck overheating in the block? Then that would cause it to overheat too far when shutting off, causing the thermo to blow open, letting the super hot coolant into the radiator, and up into the overflow?