So the site where I got my info is wrong?!
It's pretty adamant that it was a Capri proposal, although perhaps based on the Taunus, by Hans A. Muth, not Phil Clark.
Muth of course went on to design the Mazda MX5 (Miata).
There is another picture there described as the Taunus GT, but this picture is definitely captioned as the Ford Special concept car 1964!
I can't find any other site which carries this picture!