Brainerd International Raceway traces back to 1968, when it opened as Donnybrooke Speedway carved through the woods of central Minnesota. Its Muscle Car Series crowns a champion across three races rather than one, and last year’s Outlaw Class came down to a single point between three drivers. Read on for how modern doorslammers running six-second quarter miles at over 200 mph trace back to the same platforms that ran the 13s in the 1960s.