The Chevrolet sports-wagon ponycar was actually on schedule for a 1970 introduction, but never appeared in showrooms.

When the 1967 Camaro went on sale, General Motors designers were already planning their next-generation ponycar, as work was ongoing to design the all-new 1970 model. When looking at optional models for the ponycar, development of an F-body sports-wagon was contemplated as a companion model for the hardtop. The idea seemed practical, as many consumers still remembered the 1955-1957 Nomad wagon and its two-door styling.

Under the guidance of Frank Haga and Bill Porter, Chevrolet mocked up full-size sports-wagon. As one could have predicted, the front of the sports wagon was to be identical to the coupe, but an extended roof line with long side windows would be added. The abruptly-ended rear end of the body prompted the “Kammback” nickname.  Although not verifiable, it is thought that tailgates were likely designed as top-hinged hatch lids with a small window.

Management at Chevrolet wanted the Kammback to go into production, but they worried that the extra tooling expense was cost-prohibitive, and the project was scrapped.