[Stefano]

It seems that one of the ZL1 mule cars, once finished with the show circuit (it was shown at the Chicago new car auto show) was returned to GM's Central Office, where it became Jim Mattison's resposibility to unload.

The car was purchased by Jack Douglass Chevrolet, Inc. According to Jack this car had a JL8 rear axle housing and a fold down rear seat. He remembers that the engine was painted chevy orange, but does not recall if the ZL1 was removed and replaced with an L72, when he received it.

The vin is known and the car was still in the Chicago land area not long ago. The previous owners thought that it was just a highly optioned undocumented "regular" L72 COPO.

I have talked to one of the previous owners and several(very reliable) people who were familiar with the car, but only a few people I know of, became aware of its ZL1 heritage.

Maybe Jim Mattison can shed some light on the subject one way or another?