Ok heres the deal (short version). I had a tree fall on the top of my sj410, so I found another body put it on hooked up all the wiring and started the truck. Normaly the truck runs at a high idle when it first starts but then idles down, it does not do that anymore. However when I unplug the vacuum advance and the other vacuum lines it idles down, but not to the point where it should be, but close. What is going on? Keep in mind I did not un-hook any of these things in the process of putting the new body on.