I don't have much info regarding Don Yenko's racing career. I have researched his Sunray DX days, and have always referred to one article with several pic's in it. The article agrees with several other posts, the pic's are posted below with some explanation. (Credit given to Richard Prince for a fine article and excellent photos, VINTAGE Motorsport, April/May 1997.)
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These two pics are of the '67 DX Vette that was raced by Don Yenko, Dave Morgan and Peter Revson. The car is the first '67 L88 available to the public, and was driven from the St. Louis plant to Yenko Chev. where it was prepared for the race at Sebring. The second pic is of Morgan, Yenko and Revson respectively.
These two pics are of the Dave Morgan/Hap Sharp DX Vette at Sebring in '68. This car finished 6th overall, and 1st in class some 29 laps down from the overall winners. Yenko did not race with Morgan in '68.
Here is the #2 DX Vette of Pedro Rodriquez at Sebring in '68, mentioned by JoeC. You can barely see the Thompson/Delorenzo #4 Vette behind the Ferrari #39.
Finally, the #29 DX Vette of Thompson/Delorenzo at Daytona in '68, Yenko was racing with Revson and came in 4th.
