The VIN and cowl tag will only designate the body, IE: 2 door, 4 door or hatchback and whether it was a base model or the Concours/Custom depending on year. There was no special designation for the LN as it was a trim package.
D,G,H and L are engine codes. The 76 model year (some were built in 75) had a Q for the 305 engine. On the door sticker what is the date (month and year) of manufacturer? It is is the upper left corner of the sticker.