It seems as though Henry Ford and Ford Motor Company intended to enter both the Elgin Race (June 1909) and first Indianapolis Race (August 1909). At least for the Indianapolis race Henry Ford said the six cylinder racer would be used (I suspect the same for the Elgin Race too). Henry Ford's old racing competitor Louis Chevrolet (and namesake for his future chief auto producing competitor Chevrolet) won the Elgin race.
Unfortunately, Ford was listed as Number 4, and reported as scratched prior to the race because the racer wasn't ready.
Indianapolis Race article:
I think Ford racing history in general, and Ford six cylinder history in particular would have been greatly changed had Ford made both races.