Some more odds and ends.
There were more Pontiac dealers in Phoenix, One was Bud Beck Pontiac (602-947-6411) in 1980. Also a Sands but I don't know if they were a Pontiac only dealer.
Mecham Pontiac 4510 W. Glendale Ave, Glendale AZ (602-931-9111) In 1980.
Mecham did ship their cars to other dealers.
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Two Macho T/As on the lot at Rosenthal-Hayman Pontiac, Alexandria, VA.
All Macho T/As were sold as used cars to get around EPA nonsense because the engine and emissions were modified.
Would be nice to know if the Scorpion has a 301 or something more interesting in it.
Mecham /(DKM which was Mecham's sons company) Also modified Some Z28s and L82 Corvettes in very small numbers so they did not just do T/As.
This just makes me put Mecham way ahead of any other dealer as the source of this car.