The cars look to be about 50 years apart. I'm tempted to say that maybe Louis or Arthur Chevrolet was involved, most likely Louis. He was involved with the Frontenac auto, which, as I recall, had Ford origins, so I'll guess that th first car has an early Frontenac engine The second car could be the last of the normally aspirated Fords that ran at Indy in the late 1960's. I believe that Bob Hurt drove the last one of those in 1969, and was bumped. It's a long shot, I know...
Dan