I think so also.I am guessing that is turn one and two, Laguna Seca, the old layout?
Photos from this '75 IMSA event at Laguna Seca have just been posted on YouTube by Steve Holmes.The photo was probably from the '75 IMSA Camel GT event, with Hans Stuck's CSL leading Al Holbert, Peter Gregg and George Dyer in RSR Carreras.