[JoeC]

I have not seen the Yenko tuned decal in any original pictures of the Yenko SuperCars. This decal may have been used on customer cars that recieved a " Dyno-Tuning" on Yenko's chassis dynometer. This could have been any year, make, or model car that was brought to the shop. This was common in the 60's/70's for the shops who had chassis dynos. A local guy told me about having his 68 GTO dyno tuned at Motion Performance in 1969. They replaced plugs and points, recurved the distribitor, changed jets, made secondaries open earlier, etc.. The charge was about $75.00 and he got a cool little window sticker with the deal. He also said the car felt like it had a 50Hp increase but his fuel mileage with down severely.