1974 Press Photo Donald McPherson and John Zwerner discuss new Chevrolet engine

Engines, ('75 Chevy model) (with engineers Donald H. McPherson & John S. Zwerner) - Engineers Donald H. McPherson, left, and John S. Zwerner, discuss
Photo measures 8.25 x 10.25 inches.
Photo is dated 1974.
Photo back:
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