I believe that many cars have undocumented and or incorrect running parts changes for many reasons the biggest being that all cars went through the Q A C centers for finishing, repairs, cleaning etc. In their haste to get the cars ready for shipment to the dealers the centers didn't care about what was or wasn't correct per vin as far as running changes were concerned. They probably used whatever was on hand to get the cars done and out. I have never seen or even heard of any documentation of the process. I know that James Espey will disagree with this but the Q A C centers didn't have time or care about "correctness". Also the dealers when they did any work on the cars either as customer work or warranty work could have unkowingly installed "wrong" parts. One area that is particularly noticeable is early cars that should have a gas flap. They probably replaced a damaged hood and couldn't get the earlier hood so the car wound up without a gas flap. Another area is the antennae, since there are 3 variations it is hard to know just when changes occured especially when dealers were encouraged to make some changes based on customer complaints. Since the documentation is admittidly not accurate and not car specific there should be some lattitude as far as when changes occurred unless we do alot more research and polling of cars. The problem is most important to people interested in competing in concours and their car falls within the running changes. They may feel especially picked on as even if they are the origional owner and they got the car that way from the dealer, their car is "incorrect". They are left with the choice of "fixing" the car to make it "correct" or losing points. The people with "83" cars are at the most risk as many were "put togethers" using any parts on hand to finish production without regard to "correctness" so they wound up with combinations of carpet, seat colors etc. This is a fertile area for alot more research and documentation. David Teitelbaum vin 1075