We've been over this here about 5 years ago:
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The car was inspected, and the conclusion was that all of the paperwork is bogus and far from factually correct...I've talked to the owners on several occasions, as they seem to call every few months to remind us of the car. Warren D. doesn't have any paperwork on the car, wrong stripes, iirc it's not an L88, etc, etc...the problem is the wrong brother is running the show.
I keep telling the owner(s) they need to cut out the BS, quit billing it as a Yenko, do a little research and *then* they may very well have something, as there's a remote possibility it may indeed be a COPO Chevelle.