Alright so kind of an interesting update...I got the parts I ordered for the air/fuel control installed this morning- specifically a new diaphragm, adjustment cover gasket, and plunger seal...I don't really know what to call that. It's a cup type seal on the actuator rod that sticks out of the end of the control unit. Pressure tested it to 20 psi, had a very slight leak until I depressed the actuator rod, then it stopped...don't know what to think of that. Installed control, and drove the truck. Seemed to be a bit more responsive, but still drops power in the same throttle range. But now instead of stalling once the revs drop, it will idle. Still doesn't run right after it drops out, lacks power off the line...but it doesn't die like before. As before, I can shut it off, fire it up, and it runs fine again. Still scratching my head on this one, what do you guys think?