Why Does My 1967 Volvo 122S Continue To Run Hot?

My 67 Volvo 122 S continue to run hot. I have changed the radiator and the thermostat twice. I have an after-market temperature gague on the car. I must wait sometime to let it cool down before it wil...

Purchasing A 1959 122s

The car is a every day driver interior is well used with tears in the seats body is straight and paint is original engine runs well 100k miles automatic looking to buy what is this car worth