Cooling

I bought a brand new 68 Roadrunner in NY, 383, 4speed, and never had a overheating problem. I drove it to Florida in the summer of 69 and that thing was always running at 200 plus. When I got back to NY that summer it never ran the same. Before that trip it ran great, but it was never the same afterwards. Never ran that hot again in NY, but the heat had a detrimental effect on the motor.