I'm against the bubble thing with cars. I have a limited edition mustang, not as rare as this one, but damn it I will mod and race the sh*t out of it, and when the engine quits, A stronger one will go in. Ford didn't build these cars to show how big the owner's wallet is, they are MEANT to race. You'd be REALLY pissed at the thread at the M1R right now, it's got a much of modded 00 cobra r's. It's like owning a Boss 429. Yes it's worth a butt load, but I would swap out all of Ford's smogging, performance robbing parts and swap the REAL cam, carb etc that the engine had when it was used in nascar, and I would drive it and race it.
REAL car modders and enthusiats don't give a crap what model it is, whatever they want to go fast with they will. It's the people who buy it as a status symbol think "OMGZ he modded the RARIEREST Mustang made!!111!!!1!!!"