If my memory is correct they took a Corvair Transmission / Engine mounted it up front ( think about it, it would put the engine behind the front wheels) and that tied to Citroen Suspension, Front and Rear. I am curious with those "bag" suspension bits how this drove and handled...
Your right. It was called the Reactor. I don’t know if it handled well at all with the mysterious green Citroen spheres. As far as I know, it was mostly for show and no go.