Excellent info, Marshman. The sort of thing that makes forums so useful. Try finding that on Farcebook in a few months time!
I can confirm the two different splines on the Burman box. When I got hold of a good secondhand box for PUF it turned out to have different splines. Luckily it came with most of a very rusty crossmember, so the matching arm was with it.
As a useless bit of trivia the 8/10 box was the choice of drag racers in the early days of competition in the UK. No doubt because of it's small size (& weight).
Jim Moyes - 1957 Austin Cambridge A55 1800 Overdrive
Don't do Facebook but have heard others saying the same thing, impossible to search for useful info. It gets buried amongst the trivia after a few hours.
Never looked at my collection to see what box has what sized splines, I ought to make a note in case I ever need to change them, nothing worse than thinking you have a spare that you can just swap over only to find some detail has changed and it won't quite fit without other changes.
It seems that a lot of parts were used of of the 8's and 10's for various "racing" cars in the 50's and 60's. Everything from rear axles on Lotus 7's I believe, to front suspension bits on various "kit cars" - sorry Fairthorpes and and the like! I can see the steering box being a useful choice, small, light and easy to mount compared to many others of that era.
Last Edit: Feb 23, 2020 11:49:05 GMT 1 by marshman