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Matt Murphy covered his ass with the documentation of these cars. All GMMG cars have a TAG in the door and most if not all have a number on the rear view mirror.. Plus the tag on the dash over the radio that reads which car it is and its number plus horse power.. Matt also has a list of the cars that he did and what were done to each of them at his place before they were shipped to the dealers or new owners of the cars. Mark
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I'm not sure about the ZL1 cars,but all Intimidator SS's have a block pad stamping with corresponding car number as well.Dale Earnhardt was an innovator with signature copyrighting and merchandising,enough so that when he passed away Teresa destroyed all the badging and related Intimidator SS items for fear of counterfit/cloning(sorry for the off topic)