Been making slow and steady progress:
Purchased a throttle cable, OEM unit off a 2002 2500 HD from rock auto.
PN GM 15040848. Needed to massage the tab that clips into the firewall. The hole in the firewall is square while the tab on the throttle cable has ears on two sides but is rounded on the the opposite sides. I used a dremel with a cut off wheel to square up the rounded edges, making them more square. After that it fits perfectly in the firewall hole. The pedal end of the cable is about 3 inches longer than it needs to be so I trimmed the cable stop off and added a universal cable stop from Dorman. (PN 03336) The pedal has the perfect amount of travel to open the throttle 100%. Very clean installation.
My intake manifold was missing the throttle cable bracket so I ordered one on Amazon.
PN GM 89017380
Untitled by
awesome_adawson, on Flickr
Untitled by
awesome_adawson, on Flickr
Untitled by
awesome_adawson, on Flickr