Thanks for that great info everyone! You guys really know your stuff! When those pics were posted I did wonder if it might have been the Tim Buxton Falcon. But I do vaguely recall seeing that car race when Buxton first had it converted into a Sports Sedan, back in the early/mid 1990s, and from memory it looked quite different to that in the pics above. I think the flares were more boxy. Was it painted yellow? Looks like it has been changed a lot since.

One other thing, again I could be wrong. But I thought the Buxton Falcon was the former Gary Sprague car?