Al Unser, the second driver to win the Indianapolis 500 for a fourth time, captured his first win in 1970, driving this turbocharged V8 Ford-powered, Lola-based P.J. Colt for the partnership of sportsman Vel Miletich and retired '500' winner Parnelli Jones. It marked the first time brothers had been victorious at the Brickyard, since Al's brother Bobby had won the 1968 classic. Al started that year's race classic from the pole position and led for 190 of the 200 laps, surrendering the lead only when making pit stops. George Bignotti scored his fourth of seven victories as chief mechanic.