64 AND 65 have can have small round back up lamps as well, they were optional, and the 66-67 tail lamps are different from the chevelle, if I ever get out to my garage with my camera I will take some pics for ya. Also 68-69 Pontiac wagons are a little different than 70-72, you could get the GTO front end if you checked off the T-41 option on the order sheet in 1972 !