Your webmaster does have the Cotati program showing the enduro entries.  Frustratingly, they're listed by starting position rather than by racing number.  Gary Horstkorta, Historian of the San Francisco Region of the SCCA, supplied a list of the first 27 finishers scanned from a page of the WHEEL, the SF Region's magazine.  (Gary also provided some much needed car and driver IDs.   TM)

Lowe's #189 wasn't among the top 27 finishers. 

We can't see the Porsche's number, but six 356s were entered in the enduro.  Three appeared in the top 27:  Kenneth Kahn and Gordon Mills finished 6th in #165 (2nd in Class DP); Al Rekowski and Paul Bachman finished 17th in #134 (1st in Class FP); and Forrest Tindall and Bill Hinshaw finished 26th in #117 (2nd in Class FP).

Two of the unlisted 356s were (Class BP) 4-cam Carreras.  One was driven by Don Wester and Emil Pardee, the other by F.F. Gerhauser and Wyn Robertson.  The remaining 356 (Class Unknown) was driven by Richard Hupperich and (future historic racer) David Love.