The location after the TR indicates Interior trim (color and style) on cars built at either plant. The first three numbers indicate the color and style (custom or standard) and the final letter dictates headrests.
707	Yellow custom bucket	760	Black standard bucket
709	Gold standard bucket	765	Black custom bucket
711	Gold custom bucket	767	Black custom bench
712	Gold custom bench	779	Turquoise custom bucket
716	Bright blue custom bench	796	Gold standard bench
717	Blue standard bucket	797	Parchment custom bucket
732	Bright blue custom bucket
739	Blue standard bench
741	Red standard bucket	Z	Bucket seats w/o headrest
742	Red custom bucket	H	Bench seat
756	Black standard bench	Y	Bucket with headrest