on the left, Briggs Cunningham. The guy that was a few years before Shelby in fielding an American racing team, and making his own sports cars. On the right, Carroll has his name misspelled on his jacket.
Burkey pointed out that the sticker on tire says "Sports Car Special" and yet the sidewall of the tire says "Stock Car Special"
Since the photos are not in any logical order at the source, but the way the tires are in the bottom of the hauler, I'd guess they were being delivered, I'll suppose these photos were before the race.