Bobby,
You said it has factory A/C...maybe the person added it after the fact...like "Vintage Air"??
According to Team Chevelle a 1967 396-375 engine would have an EX code stamp...1966 396/375 engines have EG...
Also, see this post on Team Chevelle
1967 L78 production discussion.
Maybe Mike (Mystery Chevelle) will chime in on this post....
Good luck looking at the car...
