Here of some photos of my redneck cruise control setup. It's simply some shifter cable and housing running to a fresh hole I drilled in the extra throttle body lever. I attached a knarp for a bmx 990 U brake to stop the cable at the TB. The actual thumb shifter mounted on the truck shifter has a barrel adjuster on it for fine adjustment of the cable slack.
This shitebox truck is looking about as good as it can...
One of the other issues I've been fighting ever since the engine swap in this thing years ago is the reverse lights. I'm still using the ECU from the auto trans equipped donor truck (no emissions here, CEL is unhooked since it's always throwing codes for the shift solenoids that don't exist), and the wiring just doesn't jive for some things, like the reverse lights- which, as it turns out are really helpful, even though I don't drive at night terribly often. (evenings are for happy hour!)
So even though the reverse switch on the trans is still functional, I said the hell with it and wired some el cheapo light pods to the tailgate through a relay and stuck a switch on the dash. They're pretty effective at curbing the actions of the occasional tailgater, and the local high school kids think they're pretty cool.