The mid-1970s wasn’t a great time for American fans of performance cars. Spiraling insurance costs, falling compression ratios to accommodate low-lead gas and heavy 5 mph bumpers all took their toll on the once great muscle car.
But not everyone went down without a fight. In 1973 Pontiac unveiled the epic Trans Am Super Duty, and Motion Performance built this incredible Manta Ray from a C3 Corvette. In fact, Motion built two other Manta Rays that year, shortly before the company closed its doors, but this is the only survivor and it’s getting ready to go under the hammer at Mecum’s Indy sale in May.