Thanks guys. TX DPS ordered the marked units in a special order of 76 cars in 1972. They ordered Polara Customs with all HD equipment and the 400 CID. Not sure why they didnt get the 440.
I am slowly restoring a 1972 Dodge Polara Custom, former Texas Highway Patrol unit back to its original in-service condition. Always looking for NOS parts for my project. Thanks, John