This is very good news.
I bought off someone in France last year a specially made for racing rack and pinion to fit a 70s LHD 4/4. For those of you who like technical details it uses a rack from an Opel 1900GT. I planned to install this at some point in the future when I convert my car from RHD to LHD.
I'm therefore interested and intrigued by Mog 615's post that perhaps Gemmer is better than rack and pinion. More info would be appreciated.
A 1970s car would be fitted with the Burman/Cam Gears box originally. The Gemma is almost a drop in replacement with little re-engineering. That alone is a major plus but for me there is an even more important benefit.
The Gemmer box retains the same geometry as the original with the drop arm, and long steering links. This gives rise to less "bump steer" than the very short steering arms on most rack and pinion set-ups. It also gives excellent steering "feel" and feedback ( better even than a rack in my opinion)
The main reason for fitting an r & p is to ease steering effort at slow speeds, the Gemmer box does this also , the only way for you to compare would be to drive a r & p equipped car and compare it to a Gemmer system.