My neighbor was a new car salesman in the 60's and told me of one (4 DR Hemi Satelite) that was a four door with a factory Hemi. He wasn't the selling salesman on the car, so he was surprised when it came off the truck equipped that way.
I'm not any kind of expert on these cars, though I did stay in a Holiday Inn Express last night.
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Rick
69 Chevelle SS396 Silver L78 M21 Post Sedan (Berger Chev.)
69 Chevelle SS396 Black L78 4-speed 4.10 Post Sedan
Don't text and drive.
Somebody's life may depend on it!