65 Lamnas,
For using a suspended gas pedal you might want to look at this link. It's actually for installing a suspended pedal in a Cheby C10 pickup but has some great pics & info. I also own a 64 Cheby C10 besides my 62 Catalina. Mine was more a hodge podge of parts. The pedal came from a 73 Nove, but the bracket I used was from a 73 Full Size Pontiac - I did have to heat & bend the rod ti make it all fit & look correct & my throttle cable came from a 73 Chevy C10. Don't be afraid to hunt around to mix & match to get teh look & function you want. If you're at all curious my POS C10 is shown in post #21 with the suspended gas pedal installed.
Link:
https://67-72chevytrucks.com/vboard/....php?t=530828\