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The one in Floyd's museum was an L72 car. I believe that one is now in GM's collection.
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That's right, the Floyd's car was an L72!.
There was a thread on here a couple years back when someone was calling it a Copo car and we were pointing out an L72 was an RPO in '69..
They're sure similar cars though...same roof cargo cover even!.
http://www.bill.mcdonald.name/images...r/DCP00611.jpg

~ Pete