Need help to identify years

Was your pattern radiator from a guy named Gary? If so it is a slant 6 automatic.

Facing the radiator from the front, the top hose is offset to the left 6-1/2" from the edge of the core to the center of the hose. The bottom is on the extreme left side. The cap is centered and the drain is to the right.

The core measures approximately 18-1/2" wide, by 17" high, and is 1-1/4" thick.

Look at this thread. http://www.forabodiesonly.com/mopar/showthread.php?t=149998