I need help with an overheating issue. I have a mildly built 1979 302 that I pulled from my dad's shop it was sitting for a year maybe. I have an aluminum radiator 19"x21" 3 core 3/4" cores with an electric fan pulling air. No shroud. I've tried 160, 195, and no thermostat. With the 195 I would be driving down the highway and see 200 degrees no problem. But when I stop and turn around. by the time I get back on the highway it has already climbed to 215. And all the way back it doesn't go down and when I cruise down a back road with fan on it slowly climbs to 230 by the time a shut it off and it's boiling over. I removed thermostat and drove the same route and it eventually got up to 210. It was about 75-80 degrees out and I was moving the whole time. Head gaskets are in correctly because I can see the tabs in the front. One thing I might suspect is my radiator has inlet and outlet on the same side so it's not dispersing heat. I'm almost ready to pull the engine so any help would be great before I do so.