Okay, time for an update. My radiator broke last week, had to order another one so I figure while the truck is down go ahead and tear the dash apart and finish adding the wiring for the cruise and tach.
Everything went together pretty good, the speed sensor in the truck was the same as the one I pulled. The harness plugged right in. My truck also had the ground buss above the column even though it wasn't in use.
As mentioned previously, (I think), the firewall cutouts for the wiring doesn't exist. However, the insulation does have the cutout:
Support rod removed to access cutout:
Also, there is a dimple for drill centering in the firewall. It goes from outside in, but it was a simple matter to punch it from the inside. If you look at the firewall under the hood there are various centering dimples for various wiring combination. This one needs to be a 1" hole.
Small snag, got my wires strung and the sensors installed, but the clutch deactivator sensor doesn't come close to the clutch arm, even adjusted all the way in! Back to pick in pull hoping I wouldn't have to pull the pedal assembly just for the cruise. Good luck, I missed this small bracket bolted to the side of the clutch arm:
Checked my truck when I got home, yes it has the hole to mount this bracket so I'm back in business when I'm able to tackle it again.