NASCAR was the best back in the late 60s when you had the Daytona Charger, the Superbird, Charger 500, Cyclone 500, etc - cars that had to be put into factory production runs to run in NASCAR, cars that broke the 200mph barrier, cars that forced tire companies to update technology cause of blowouts at such high speeds - where the bigger the engine, the better ( and it too had to be marketed to the public, thus how the 426 hemi came to the street )

That was the epitomy of Nascar IMO ( and #43 drove back then too )