Denny, Seeing that your at the end of your rope with this and all the stuff you've done and all the other thoughts on this.
The only shop I've ever fully trusted with frame,alignment and balance ( and this goes back to the early 60's when Carl ran it and now his son Curt has it ) is Hartman's Beeline in Elgin on W.Chicago St. 847-695-7755 He has or did have the only on vehicle tire/wheel balancer in town. He's one of those guys that don't let anything slide by. It's at least worth the call to see if he has any suggestions or has come across the sort of thing. If he hasn't ask him to check with his dad who worked with vehicles of this age.
In all the years and countless stuff I took there I was never unhappy with what they did for me. And don't be pullin any more hairs out ! lol
Dan
