Barfly,Prentice, Rick
oh I wish it was that simple. I took the tank and the lines up to the regulator off a truck that was running got the same results. I did notice if I disconnected the vacuum line to the PCV valve and cover it half way it idles.I see an adjustment screw on the regulator next to where the vacuum line connects and 2 adjustment screws big and small on the carb is there a procedure to set these. I think about a dozen people played with this truck before I was informed there was a problem.

thanks again
Stan