Because there is no state income tax in South dakota, no emissions testing/safety inspection and it was $25 to register a car.
The holy trinity of somebody who has a large muscle car collection.
Since we sold off most of muscle cars and South Dakota wants to actually see the car they are licensing now, and my dad sold a business he owned in Sioux Falls, we just license stuff in Texas, now.
The one ringer on the classic list is the '71 Boss 351. These were not 13 seconds, stock. The Motor trend Test car from the article that generated the 13.80 had slicks and headers put on by one of their sister publications (either hot rod or car craft) and the car has no business being in the top 50. It is a mid 14 second car, at best.
When I see someone paying big bucks for a Boss 351 at Barrett Jackson, My face looks like