I believe that there are also a couple of the Superbirds bulldozed under in the same rivine. Seems that Petty didn't own the cars he was racing when he being sponsored by Plymouth, and as such was supposed to destroy the cars when another was built or one was wrecked or damaged. This was his way of disposing of the cars, as they could not end up at the junkyard for a number of reasons. The cars were bulldozed not to get rid of them, but just because they were out back and were just pushed over the rivine when the parking lot was expanded, and eventually buried. I believe a couple of the Superbirds were also unearthed to a degree, but again not available because they are not his, not unsaveable, and supposed to have been destroyed!! Geof