Powerband I had the same problem of overflow with my 62 1/2 ton 62 235 c.i. truck. I installed an overflow bottle from Autozone, running a 7 lb. radiator cap. After a run in Texas 100 degree weather you will have some overflow but it flows back into the radiator as it cools. Put a little coolant in the overflow bottle (*theres a mark on the bottle). I run a 180 degree thermostat in the summer and a 195 in the winter. Be sure your radiator is clean and run 50/50 coolant and you should have no overheating problems. Also make sure your engine is well tuned and the timing is set correctly. Have a great trip!
