Yet another lucky find (while researching another Carnut puzzle!) This seems to be the Australian Special dubbed Project X, a tiny, mid-engined, Mini-powered exercise from Mike McCarthy in 1965 and featured in issues of Sports Car World and McCarthy's book.
Yes, you're right.
For my 4000th puzzle I wanted to post something very difficult if not quite impossible and I thought I'd found it.
Even Googling with the full answer or using Google Search by Image produces no results at all!
The fatal error I made was posting the Valano as well, completely overlooking the fact that the Valano is featured in the same magazine as the Project X, so any search for Valano will produce an image of the front cover of SCW.. D'oh.... What an idiot!
Here are some more pictures: