Auto Racing – 1979 – Michigan 125 – Highlights Al Unser Sr Coasts To Pits As Gordon Johncock Leads
In 1972, Roger Penske purchased the speedway for an estimated $2 million….when during Penske’s ownership the track was upgraded several times from the original capacity to 125,000 seating capacity. and from 1996 to 2000….the track was referred to as Michigan Speedway. This was to keep consistency with other tracks owned by Roger Penske’s Motorsports International before its merger with International Speedway…