Motown,
Did you ever get to talk to the owner directly via phone or face to face? I am curious what kind of a guy he is... who knows maybe this car has some great sentimental value to him...
Do we have a VIN on this car? What is the history on it? I think someone with a restored Yenko should drive over to his house in the spring to show him what his car used to look like and to say hi to him. (and maybe bring along a six pack!!!

) And do it in a friendly manner not trying to push the guy around about selling his car. Just to talk cars, hell the guy has a Yenko! He has to like cars!!!
Would love to know the story behind this one..... Motown... were you able to get any history on it?
I have to agree with previous statements... this is America and if someone wants to let a rare historic car rot in his yard it is his right... but maybe it would be possible to get the guy excited about cars/his car again and then maybe then he would want to save it or just keep it from rotting away...
This story needs a happy ending!!!!!! (if I lived by there I would have to take a drive by and say hi.... what the hell..)