You can use your gas pedal if you smooth up the under side of it. You are going th need the cable , pivot and plate . The plate for the under hood is easy to make. Here is a picture that I saved from somewhere
LOL, those were MY parts!!!! I have sold complete sets like that on eBay and on FABO, I will see if I have any more left. If you can find the parts, go with the factory 64-66 V8 stuff, it bolts right in and works great!! The gas pedal is different too, it sits at a different angle and the back is different than a S6.