I went thru this and you need one of these type setups http://bouchillonperformance.com/meta-product-kickdown-cable-kit or there's a factory cable box that some of the trucks used. That will get you the throttle valve hookup and the pedal sensor for the computer.

"It's funny how one project eventually leads (or forces) you into another one.
It's really just one endless project designed to induce insanity and bankruptcy."