I loved those Super Stock AMX cars; still do love 'em!. They ran SS/D and would have battled with some pretty stout competitors including 427 Camaro's and some Hemi cars.
The story of the "skunk works" update package is interesting. I know for a fact that Oldsmobile's D.Dale Smith also sent update items to some of the Olds teams, but I can't say if new VIN tags were included. I DO know that NHRA was a lot more strict in their rules those days compared to today in what was/wasn't allowed in terms of engine/body parts.
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