[Martyn L. Schorr]

Not sure why you call it a Phase III GT Corvette? As far as I can see it's a customized mid-series Corvette and may have custom parts from Motion Performance. Motion sold a lot of fiberglass Corvette customizing components, some installed, some in boxes via mail order or over-the-counter. Motion did not have its own body shop.In addition to its own branded customizing body parts, Motion Performance sold fiberglass parts from many manufacturers. Mods shown here were pretty popular back in the day,
Marty