Originally Posted by Gen1dak
Something else. You want to be sure the vacuum line to the distributor is connected to the ported vacuum port, not the full time port on the carb. On the AFB these two ports are on either side of the two idle screw adjusters. Facing the truck, driver side being to your right side, looking at the carb, the ported vacuum port is on the left side of the front of the carb, directly to the left of that side's idle adjuster screw. Cap the port on the right side. If not hooked up to the ported vacuum it'll never run right.
If i'm not mistaken thats how it is hooked up, but if not, I'll set it right.
More pics and audio clip coming tonight.