Revealing mistake: When the sheriff's cruiser is first seen, you can see Cooter's yellow cap. After the jump, you can see the black helmet of the stunt driver, and the patch of the Sheriff's office.
Revealing mistake: Three times during the final chase there are close ups of the boys in the General Lee. If you look, the car is stationary on a brown dirt road, and the car is being shaken to simulate driving.
Revealing mistake: When there is a close up of the boys the first time they are driving through the junkyard, you can see through the passenger window that the car is being shaken to simulate driving.
Answer: Various reasons, but mainly to drive the Dukes out of Hazzard County because the family have been foiling his schemes since his and Uncle Jesse's bootlegging days.
Captain Defenestrator