If you got it from the Truck Shop it will not work unless you modify the accelerator lever bracket. If you have a FAX number I can FAX you the page from the truck instruction manual that shows this assembly.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine