My first thought was that this 1973 Chevrolet Corvette converted into a sport wagon was the product of John Greenwood’s experimentation with the body style, but some quick googling shows that Greenwood’s conversion(s) were meant for the later rubber-bumper third-gen Corvettes. It appears, then, that this one came from an earlier design, possibly by Chuck Miller and almost certainly marketed by Eckler’s. From the seller’s description:
1973 Corvette Sports Wagon, 1 of 10 made, very rare piece of Corvette history, 350, auto, number matching,
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