In 1972 my Dad tied for 2nd with Denny Hulme in the Can -Am Championship against this car Vs dads' Vasek Polak Porsche 917/10..He didn't get the Turbo Motor until riverside...Then Vasek fired him to hire Jody Scheckter...I can't remember the race ,but my stepmom has a picture..I think it's Mid ohio,where Denny takes off in the air and my Dad drives under him..
https://www.youtube.com/watch?v=ZBNh8LMShyE&feature=related

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1972 Milt Sr. in the Porsche917/10,Mechanic Alwin Springer-Ex President of Porsche Motorsports of North America,and car owner Vasek Polak