Well, I came home this evening, got it up in the air where I could get a better assessment of the situation. I'm 99% sure that the problem is the idler arm busings.
This is good news, bad news. Good news is it is about the cheapest thing to put in the linkage, bad news is that in this chassis it appears that I will have to remove the exhaust system to get the bolt out. I will start another post to see if I'm missing something, but it is probably a waste of time that I could be using to get down the exhaust system.
Thanks for the replies,