As far as I know he drove all of his scenes in LeMans driving the 917-10’s Porsches around LeMans aka the LaSarthe circuit. One of the most successful race cars in history but not particularly safe.
James Garner did all of his driving in Gran Prix and was a very good driver like Steve.
As far as Sand Pebbles - probably his best film. The Great Escape and Magnificent 7 was also pretty good too. :-)
“As far as Sand Pebbles - probably his best film”
A great flick!
Some of the best book trivia is about the fence jump in "The Great Escape". He wanted to do that one too, and probably could have. His riding buddy and favorite wrench, Bud Ekins was brought over from California to do it.