Baldwin Chevrolet was run by Ed Simonin, son of its founder, August 'Gus' Simonin, and Ed's brother-in-law, Dave Bean. Motion Performance started life at a Sunoco service station in Brooklyn, NY in the late-1950s. In 1963, after Joel Rosen, then a junior partner, installed a Clayton chassis dynamometer, signage was changed to reflect the true nature of his business. In 1966, Rosen incorporated as Motion Performance, Inc. and relocated to his own shop at 598 Sunrise Highway, Baldwin, NY.
Starting in 1967 and running through 1974, Baldwin-Motion offered SS (425-hp) and Phase III (500-hp and up) big-block Camaros, Novas, Chevelles, Corvettes and Biscayne Street Racer Specials. Cars were sold at Baldwin Chevrolet or Motion Performance, converted by Motion and financed and delivered by Baldwin. Phase III 427 and 454 cars came with a written, money back, quarter-mile performance guaranty from Joel Rosen.