Thank you for the responses Mike and Terry!
Will have the radiator checked for blockage, replace the thermostat (I noticed a spare with gasket in the trunk), and see if that takes care of the problem.
Not sure if the radiator is original from the Studebaker, or if he used the one from the Buick.
He worked on it off and on for about 20 years. He replaced the engine because of a cracked block.
Not sure what his reasoning was, I figured due to availability of parts but really don't know.
It does have an electric fan on the radiator that does work. It has a manual switch for the fan and I did have it on.
The temp did not get into the danger area, but when I turned the vehicle off, quite a bit of water came out the overflow.
Thanks again the input and your help!
Any other suggestions greatly appreciated!
Russ