I watched one going round Mildenhall in the pre-70 about twenty years ago now. Fitted with what I was told was a six-cylinder 1600 out of an early Vitesse,it fucking flew and sounded good as well.

Pretty sure that's a Jaguar.

I can't recall which,but the caption with the picture said it was in either New York or New Jersey. It does show just how crudely the fins were attached though.