You can put anything you want in general parking but I think you may be a little hard pushed to get it on a Ford stand inside Silverstone itself.... it being Ford Fair and all.....

The traders of course take their hacks in but.... hey, I have an idea.... fit a Cosworth engine in it, get it featured by Fast Ford and they'll probably invite you onto the stand..... my mate's BMW E30 cosworth engined motor made it onto the Fast Ford stand a few years back....