73 - 74 Barracudas had a larger trunk lock cylinder in the tail light panel held in with a large threaded nut, 72 had the 70 - 71 style trunk lock cylinder held in with a clip. Seat belts are different also. If the glass is there check out the date codes. Do you have some pictures? Especially of the grill area as I like the grill on those year Barracudas.