hmmm im going to pop round my mates tonight to take another look at this box it deffinatley has the non cradle mounts(4 bolt holes in a square on the front of the houseing)
ill bring it home. either way im going to rebuild the s1 box so im going to have to source an output shaft the only thing ive found this far is.

https://www.bearingkits.co.uk/Ford-E...-ratio/677.htm

but i`ve never heard of them and if its chocolate and rips the box apart ill be screaming.
so i my next mission is to try to find a part number for the output shaft so i can try to see if that shaft was fitted to anything else.
think ill pop in my local ford trade