I am not sure on the 67 cars but on the 68 cars they raced quite a few. Contrary to what most people might think, they were not the original owners on many of them. I know for fact that they sold (at least some of) their 68 cars in 68, 69, 70. S&M bought alot of cars from racers - set them up - sometimes re-painted them and sold them but I know that some of these also were been turned into S&M raced cars as well. They had new cars in 69, 70 & the one Ronnie raced in 74.
Mark J