I have an issue with overheating. I bought my Nova and it had an aluminum radiator. It had some leaks so I changed it. Before I changed it on a hot day it would run around 200 and that’s running a vintage AC system. On a cooler day around 180 it would eventually start to overheat if idled too long. Bought a new 3 core radiator from summit racing and installed it. Didn’t bleed it well enough and thought I was good, so started driving and notice temp was rising over 230 and pulled over. Coolant was low and waited to cool down and did the bleed procedure again. I then changed the thermostat(180 w/fail safe), upper hose and new sending unit. Now I again tried to burp the coolant and was going well staying at a solid 180 at idle for awhile. So I tried to test drive it and then the temp started to go up again!!! I went and even bought that fitted funnel to help burp the radiator and now at idle it’s starts to go up in temperature! Not sure what else to do. I didn’t have any of these problems with a leaky radiator. Please help, I’m not a mechanic and bought my car trying to learn it on my own as much as possible.