A buddy of mine in Covington, GA built the original General Lee's used in the first 6 episodes in his body shop. One thing he told me was that they would have 6 or 8 cameras shooting ever jump scene with each police car, the General, etc and all from different angles. This way you could use that same jump sequence in different episodes. After hearing that, I went bck and looked at the different episides and noticed you never saw the General being chased in the jump scene (when it actually jumped) and you never saw the General in the same picture when one of Roscoe's cruisers crashed into the various ravines, ponds and creeks.
I also kind of find it weird that I have to really look hard to find true "dirt" roads here in GA. We have so much red clay covered by asphalt it is amazing.
So you know Henry Holman of H&H Body shop?
The first 5 episodes were in Covington. all others were filmed in Cali.
It was definitely a '73 to '75 each time...........I read they used 11 or 12 General Lee replicas, so they definitely had more than 1 Uncle Jesse truck, don't ya' reckon? ......and Yes Cooter did have a Ford wrecker .....1973-79 I believe
Life is what you make it, so make it good for yourself .
There were a few 1973 early 1974's because I noticed a few with four screws on the tailamps. I also noticed a few without Custom Badges or holes on the back, (That I could see). This suggests 1976 truck with the 73-75 grille inserts. Very easy to swap the grille inserts out. They also removed the ford lettering from the grille too.
So anywhere between 1973-1976 would be plausable. 
Cooters tow truck...
Early episodes he drives a 1967-1972 Chevy. Either blue on white, or Brown.
Later on he used a 1978 and/or 1979 F-350.
He's also seen using a 1967 F-350, blue on white, tow truck, painted simular to the chevy.
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