I have a 1966 Chrysler Newport Convertible. This car had the original 1966 727 transmission and 1966 383 engine. I removed the engine and put a 1977 440 into the car. I kept the original 1966 torque converter in the transmission. Later, I was informed that the 1966 torque converter was not the correct torque converter for the 1977 engine due to balancing issues. Years have now passed and I am getting back to the car. I called the transmission shop and they wanted to know much more information than 1977, 440, 727, torque converter.

Can somebody help me identify the correct specifications to get this car on the road with the correct torque converter?

Thank you very much for your help!