My guess is that some low option mule vette was "restored" with all the coveted goodies, high HP big block, M-22 trans., leather seats, etc, and was re-badged with the new option appropriate serial numbers and VIN plates. The only problem is that the geniuses that put the "new" VIN tags on the car used the "hot" plates from this Alan Poster guy's stolen car. His car was most likely parted out years ago.
Anyway '66's rule.
Also... I find it hard to believe that a car stolen 37 years ago is still on the books as being stolen. That must be one heck of a big data base to keep track of all stolen vehicles since the '60's. Maybe one day my GSXR, that was boosted in '91, will turn up.
'66's do rule. especially if the're Chargers