The problem with swapping 403 shakers with 400 shakers is that they won't swap. Until now, I was a die hard believer in the 3 car use but , now i am doubting it. Think about it, 1 car was pretty much demolished in the bridge jump. The car that jumped onto the ball field ended up running into the CEMENT BLOCK dugout. That wasn't planned so, they built a wooden dugout and filmed the car busting through. (per Hal Needham interview). You know that scene didn't do the car any good bodywise. Also read in another interview that the mailbox scene actually did a lot of damage to the car. The scenes where they jumped around between lanes through the median while being chased by the georgia hwy patrol damaged the car pretty good also. You can see the bent up front end easily. And we don't know what sequences the movie was filmed in. Also, just think, If they smooth ruined at least two cars and saved one for close ups and what not, then the only option would have been for the studio to buy a couple cars off a lot somewhere. Since the movie was filmed in the summer of 76, that means any cars that didn't come from Pontiac would have to be 76's. This is turning into the Smokey and the Bandit Mystery, and I'm afraid if I watch the movie anymore, my wife is going to create a mystery as to what happened to my dvd!!!