Gas Pedal Conversion?
When I first converted from /6 to a 318 in my 64, I used a pedal assembly, cable, and throttle bracket out of a bronco. It was $20 from a parts yard (I was a broke 19 year old). Had to make little spacers for where the pedal bracket mounts and drill bolt holes into the floor pan, but the cable throw was perfect size and the throttle bracket bolted up to the 318 intake.
Still have that setup on my 440 Valiant with a little more fab work on the throttle bracket.