The Monza GT content starts around :30. No sound. This is supposed to be the XP777 Monza GT chassis #3 (rear mounted modular flat 8/6 motor), with a front fiberglass clip from the Monza GT and a fabricated aluminum rear clip made into a roadster resembling the XP782 production version Monza SS. Bill Krause drove it to within one second of the lap record at Riverside International Raceway. Later chassis #3 became the chassis for the Astro I. But it raises more questions than answers. Maybe your viewers will be able to provide information.—Roy Lonberger. Video provided by James Musser.

  1. Mel Francis

    Amazing historical footage! Too bad Bill Mitchell’s aspirations for a smaller, entry-level sportscar were thwarted, with the termination of the Corvair development program in 1965. Porsche took up the challenge of developing a rear-engined six-cylinder sporting chassis from this point and the rest became history. Thanks to Jim Musser for releasing the footage, to prove how committed his fellow GM engineers were, to achieving the goal for Chevrolet.

  2. Andrew

    I like seeing footage like this – cases of what might have been.
    Shame the programme never went further.
    Was the second car a version of the first? Shades of Corvette/Mako Shark there. Both very interesting cars.

    Thanks for this film.

  3. Karl Ludgigsen

    Wish I had been in these scenes but…no. The guy in the black suit could be Claude McCammon however.

    I do appear in the Chevy brochure about the 777!

    All the best,

    Karl L.

  4. WOW! Thanx for sharing this ; I had never seen the ‘fixed headlight’ nose before. Love love LOVE these cars ; as has been said, as much as I like Corvettes – and thats a bunch – its a crying shame that this program never really reached maturity and no production variants were generated. Woulda been great. Oh well… I have a few models and my Chevy Jr go kart and can dream… 🙂

  5. Mauri rose was the driver in the 3rd clip and Joe Marasco, the project draftsman, was the smoker in the last scene. That information is according to Jim Musser.

  6. Looking back at that time it would be great to have a discussion about the design influence of the Monza GT on the Lamborghini Miura and the De Tomaso Mangusta.

    Also on the influence of the Corvette SS on the Jaguar XKE.

    Because of the size of those cars they could relate to the small sporty European cars.


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