In 1959, Jack Brabham ran out of fuel just short of the finish line and pushed his car across the finish line at the United States Grand Prix at Sebring. He finished fourth. I think that an addon for the wonderful laser scanned Sebring track, replicating the 1959 GP circuit at Sebring, would be a great tribute to "Sir Jack" and present some challenging racing in some of the vintage cars already in game.
someone could do a mod with every driver pushing the vehicles from the beggining. 1 horse powered vehicles