...........Run the engine until operating temp with the radiator cap off, leave the coolant level just below the lower part of the radiator cap filler neck opening. Put the cap on with the engine running and then cut it off. Wait until engine is dead cold, fill the overflow tank to the COLD MARK only. It may take two to three warm ups and cool downs to normalize the level in the overflow tank, always adding as necessary when COLD. Make sure you have a NEW radiator cap. Good luck and travel safe.
USAF 1959-1963/ JFK Innaguration parade 1961,
1997 Fleetwood Southwind 37Y, 460 ENGINE on FORD chassis, Power Platform with Tag Axle.