I can tell you that I picked up the B15b Chevron that Reine Wisell won Sebring with in 1969. I will scan a picture of both of us talking at Sebring and post it in a day or two. I bought it from Fred Opert. There are pictures of this car on my website in the "Doug's Biography" section
www.brennerfab.com.
I am also sure that Smothers car was a B14. It hung out at Frank Monise Motors in Pasadena, California and it got me interested in having a Chevron.
I raced one Continental race in 1969 at Castle Rock, Colorado in an ex-Sandy Sheapard Lotus 41. I don't really remember who was there.