RE: PIC
I was going to do a write-up on this someday, but I never got around to it.
When I bought my '68 deuce, "C" turbo, it would barely get into second gear (not enough power). I managed to get into third once, going downhill. So, I did the basics. Read the manuals, searched and read all I could find on this site, and chatted on the chat rooms on occasion.
Changed all three filters, took the in-tank pump assembly out of the tank to check the condition of the intake screen, and carefully went over the entire length of fuel line from the tank to the IP. After all of this, it was still the same. Well, I did notice a small improvement, but it would not get above 20mph.
So, I purchased a pyro, researched all about them right here on SS, and decided to mount it pre-turbo. Removed the turbo (literally a 10 minute ordeal), drilled and tapped two holes in the manifold (one on either side of the divider) and plugged one.
I then cut the safety wires through the bolts retaining the cover over the fuel adjustment screw, and removed the cover. AH.... now I found it! The fuel rate adjustment screw has two nuts (jamb nut arrangement), both of which were loose! The nuts must have slowly backed off over time to the point it was when I purchased it. (The previous owner believed it needed a new IP)
I then gradually (read: 1/4 turn at a time) adjusted the fuel rate and drove the truck. It took 2-1/4 full turns of the nuts to get where I am now. It will run at 700*-800* on a flat run, while seeing 1050* on a long run up a big hill. It has never gone over 1050*.
I would not do this with out getting a pyro, and doing all of the basics first. And read, read, read, your TM's and search this site and read more.
Good luck, and keep us up to date.
. just got 11 more to go to graduate