Period

Chuck Dietrich at Virginia International Raceway, April 1963 SCCA Nationals.
Photo by Jack Upchurch from
http://www.virhistory.com/vir/63-apr/63-apr-du.html

"Chuck Dietrich manned the American-made Bobsy II and led the GM gang from the start but it was Dr. M.R.J. Wyllie's Lola with a first-lap five-second lead which built up into something quite uncatchable to second overall. Oil spillage on the clutch took care of the good doctor's sure win and after a carbon tet spray fest in the pits, he zoomed out in pursuit of the now leading Bobsy and Tweedale's Lola, with Wyllie picking up 20 healthy seconds in the next two laps. So it rests after two nationals-Wyllie lost this one and Bobsy and Lola are tied for first. Not bad for the Bobsy's first serious debut (Dietrich commented it's an 'awful hard car to drive.')"
Race report from
http://www.virhistory.com/vir/63-apr/63-tms.htm

"After lunch the Juniors and III's challenged the G modifieds, with a Junior taking the cookies. Charlie Hayes had settled down to a sure second overall when the leading Lotus 22 of John Henderson spun into the woods at Oak Tree 3 laps from the finish. The Elva then scooted home ahead of Chuck Dietrich's Bobsy and the Lolas of Art Tweedale and Doc Wyllie. J.W. Gadwa's Cooper XI took F III, and then ran out of gas on the victory lap."
Race report from
http://www.virhistory.com/vir/63-apr/6304-bk-report.htm

bobsy