Porsche 356s at Laguna Seca -- ?????

Not only do I have no idea who's driving these Porsches, or when, but I can't place where on the Laguna Seca course this photo was shot.  My first impression was that the course was being run in reverse and these cars were climbing UP through the old Turn 7.  ????? 
 

(11-12-11)   From Chris van De Wiele:

"#47 might be Fred Gerhauser in a production car race of the Pacific Grand Prix October 22-23, 1960."

(1-7-12)   From Cyril Reif:

"Isn’t this just below the corkscrew??"   (I think so.  TM)

Can you help me with this photo? Please email me!

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