My understand was one white, one yellow.
George Heberling (Asst Staff Engineer - Production Engineering) drove one of those as his company assigned vehicle. (I went to GMI with his son Chris).
The orange car you are thinking of might be the mule vehicle used during the Long Lead Press show on the GM Milford Proving Ground's vehicle dynamics pad (aka "Black Lake"). The car has been reproduced, quite authentically, but is not the original.
https://www.nytimes.com/2014/08/17/a...=top-news&_r=0
http://www.motortrend.com/news/1969-...e-lt-2-review/
K
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'63 LeMans Convertible
'63 Grand Prix
'65 GTO - original, unrestored, Dad was original owner, 5000 mile Royal Pontiac factory racer
'74 Chevelle - original owner, 9.85 @ 136 mph best
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