Wow, I was drooling over this car for a long time! I think it has been for sale for a few months. http://seattle.craigslist.org/tac/ctd/1072209682.html
Look at the bottom of the repro quarters. That extra metal is supposed to be trimmed off. Rest of the bodywork is probably hacked as well. It's been on Ebay a few times.
here is the other thread http://www.v8buick.com/showthread.php?t=171857 I dont think it is a bad deal try and find one any where at least in Canada here i would take that one and save the time to do my own GS400 convert that needs 1/4s but i have had mine 29 yrs and is a family thing now just my .02 Ken