The gloried performance car modifier of the holy muscle era, Yenko, is obviously most associated with the monster Chevrolets it created through big-block transplants. That changed in 1975 when a customer decided he wanted to hammer everything in sight, including a local Pontiac dealer’s son, who drove a Trans Am with the 455 SD powertrain – a real Super Duty, a hand-built performance engine.
He took it over to Yenko’s shop in Canonsburg, Pennsylvania, where the crew there created this car, billed as the only Trans Am to have been retrofitted by Yenko with a Chevrolet L88 big-block, 427 cubic inches and a conservatively estimated 550hp, plus 4.10 gears. It’s on sale beginning next week at the huge Mecum Spring Classic at the Indiana State Fairgrounds in Indianapolis. You can check out the lineup at www.mecum.com.
