BoP,
I got this out of wikipedia:

Starting in 1912, riding mechanics were made mandatory for all races of 100 miles or longer (which included Indianapolis).[3] In 1923 riding mechanics were made optional, and only one team utilized them.[3] They were brought back from 1930 to 1937 and made mandatory once again. From 1938 on, they were again deemed optional, but no teams in the starting field used one ever again. In the years immediately following WWII, nearly all two-man cars had been parked, or converted to single-seaters. Riding mechanics were formally written out of the rule book in 1964.[3]

I was surprised to see they were not written out until the '60s.

Last edited by THE FRENCHTOWN FLYER; 10/24/14 12:45 AM.

FORD 300 inline six - THE BEST KEPT SECRET IN DRAG RACING!