Conner,
Thanks for all the help...

I guess I will look into changing out the TPS, but let me also fill you in on what has been happening with the truck and parse out the things that might be unneeded from the post...

The original problem was not starting and not staying running when I got it started after putting everything back together when I rebuilt the motor.. The down side is I had a buddy helping me clean off parts and things so no telling what got messed up.

It started right up more or less the first time I attempted it (after plugging everything back in), there were a few problems so I killed it after a few seconds of running. It actually started and was running a couple times without problem. once I had it finally up to temp the first time it sputtered and died. I then did the tests/troubleshooting below.

I am getting spark and before when it did start it was running in correct time and running very smoothly, so timing isn't an issue...

It is getting gas and I put plenty of dry gas and high octane gas in it to get rid of any moisture in the tank, plus pulled the fuel filter a couple times and let it drain out to get moisture out since water settles to the pump pickup, before putting the dry gas in and high octane...

That left air as the culprit in my troubleshooting of the no start issue.

When I had a helper cranking it, I played with the throttle body blades to attempt to trick it into thinking there was airflow or something and with the blades slightly opened it started and ran for a while...

Rechecked timing - good
Started to take it for a quick test drive and as soon as I gave it gas it died...

I then cleaned the IAC because it was gunked up because my buddy was using parts cleaner and spraying it all over everything and even dipping the intake (with TB and all sensors attached) into little puddles of parts cleaner/gas...

After cleaning the IAC it started and seem to run forever it idled in front of the house for about an hour or so. I decided then it must be doing pretty good. I went to start the breakin process and as soon as I gave it a decent amount of gas it died again this time it was a little different. I was going about 10 MPH, and gave it about 60% or a little more throttle, it downshifted to 1st gear felt like it started to pull pretty good for about 2 seconds then stumbled, the stumble stayed for about another second and I got scared and got off the gas. I then coasted down to the stop sign ahead, while coasting the idle was really low, about 4-500 RPM's, as soon as the truck was about to stop or just about when it stopped the truck stalled and wouldn't restart...

After that with Franks help we tested the IAC and it tested in spec, then in rereading my posts frank saw that I had someone trying to start it while I played with the throttle blades and suggested checking out the TPS (Middle of page 3), and at the top of page 4, I give him the results and he requested you to help...