I cant really change the pivot distances at the pedal theres just not the space, so I guess there are 2 options
Turn a smaller pulley for the throttle body.
Put a pulley on the bottom of the pedal and loop the cable back to the backplate. This will create twice the cable pull for the same pedal travel. I would need to use a longer cable but they are cheap enough.
I think option 1 is easier.
Cheers
Stot