Somewhere between 256 and 321 "General Lee" cars were created and mostly destroyed during the series. Less than 20 in various states of disrepair still exist. Despite popular belief, there were no 1970 Chargers used in the series according to all the car builders.
I remembered hearing a statistic like this a long time ago. In reality, a jump like they did casually on that show would have severely bent the frame and destroyed the front suspension. But Catherine Bach's suspension was still in good working order when the series ended!