Josie, if you keep adding coolant you’re going to keep boiling it out. The level in a stock AD radiator when "cold" should be just barley above the baffle in the radiator. This is often mistaken as a low coolant level, if you add coolant to bring it up some it's just gonna puke it out. As Pete stated, if your temperature is running normal then let it seek it's own level, put the cap on and forget it. If the cooing system is stock then it is a zero pressure system, you can get away with a 4lb. cap but no more or you will be bending tubes in the radiator and heater coil. Running your cooling system at 4lb. will increase the boiling point slightly. Your '62-235 would have originally run a 160° to 180° thermostat depending on the season.
Denny Graham
Sandwich, IL
