I've got an article around somewhere from the 80's that features a Pantera that Shelby's crew played and installed a turbocharged Chrysler 340 engine. I remember it having a pentastar emblem on the hood as well. The car was reportedly scrapped, but it still gets me thinking of how much fun it would have been.
Was it white? The reason I ask is that about 5 years ago he had a white one in his shop in Gardena, CA. I asked him something about it and he told me his guys had got it up to about 800hp and it was a real beast to drive.