I might aswell say what I think it is, it's a Cheetah MK2 Le Grand from the mid sixties, only for or 4 of these cars were build. Made in California, by Aldin Le Grand. Powered by a BMW 700 air cooled boxer engine. And I suspect as it was used in the BMW cars in the back, it is fitted here at the rear, hence the air intakes at the back.