Suppose I had better add a little confusion to the debate
I am the proud owner of BT35X-1, the late Sir Nicholas Williamson's hillclimb car.
I found the bits rusting away in the shed of a house that was being cleared, following a tip off from an acquaintance; the poor car was in a bit of a state as you can see from the pics.
I acquired the car along with a spare space frame and a few other bits. I can’t remember the number of the other space frame for certain, but I think it might have been BT35-17. I swapped this space frame, for bits that I needed to rebuild BT35X-1, with a chap who planned to rebuild it into a complete car, although I don’t know for certain if he actually did.
The spare space frame had been much modified at some point, the top rails of the engine bay were tapered quite sharply towards the rear of the car, rather than being parallel as they are on X1, and the engine mounts were quite different. I don’t know what engine had been used in this car but it certainly was not one of the ubiquitous Ford derivatives. All of the running gear of this car had been used in the construction of a space framed Mk1 Escort special saloon race car, which I also acquired at the time, and still own.
During the rebuild of BT35X-1 I started a dialogue with Sir Nicholas and I retain the letters that he wrote to me on the subject. The plan was to re-unite him with the car once it was finished. Sadly he passed away before the car was complete.
I am rather busy with other activities these days, but sooner or later I will re-unite the car with the hills it was built to compete on.