Thirty-three years after the big crash, Penske told Argetsinger: “Mark was my best friend [this, despite Donohue once spearing his boss with an AMC Javelin in the pits, tossing Penske 15 feet].

In 1968, Mark Donohue and Roger Penske won a championship in the middle of the golden age of Trans-Am racing with a very special Chevrolet Camaro. That car was the "Lightweight" Z/28 — a car ...