Check out the wilwood pedal assembly.
http://www.wilwood.com/Images/PEDALS...40-1290-lg.jpg
Also, I've been looking at GM vans in the scrap yard. Doesn't look too hard to get pedal out. Should center somewhere above steering column on firewall.
Here's Wilwood pedals in a TF truck.
http://www.customclassictrucks.com/t...n/viewall.html