For all of the guys looking for a pedal bracket to work with the 73-87 trucks, here's a thread that has some great info in it:
http://67-72chevytrucks.com/vboard/s...d.php?t=692222
http://www.hotrodlane.cc/Streetstories/81%20swap.pdf
Apparently a factory OEM gas pedal from a 94-02 CHEVY GMC 6.5L V8 DIESEL (PN 15984422) will bolt right in. You have to repin a few wires, but it's supposed to be pretty straight forward.
The .pdf file has a complete discussion on the entire install, but here is a small snippet:
"This is the installed Pedal Position Sensor AKA Drive by Wire pedal.
I used one from a 1998 6.5 Diesel truck as it bolts right up and is a closer match
than the later Silverado pedal. A couple of the wires do have to be moved as it is
internally wired different. Basically, there are three different sensors in the pedal
and the PCM compares all three of these to determine how much throttle
opening the drivers is requiring. If these three sensors do not agree, a code will
be set and the PCM takes a best guess at what the throttle opening should be.
The gray wire was moved from location A to J, the Brown wire was moved from
location E to A and the Yellow wire was moved from location J to E. I also had to
add a slot in the connector plug so it would plug into the pedal."
PLEASE NOTE I HAVEN'T TRIED THIS ON A TRUCK, I'M JUST PASSING THE INFORMATION. DO YOUR HOMEWORK BEFORE YOU PURCHASE ANY PARTS!!!!
Good luck with your LS Swap!!!