Interesting on the rebuild kit, I hope you don't need it.

Finally it stopped raining and I could get  out for a little run for Drive It Day, all good, the taller diff ratio has made a big difference, pleased I changed the first gear ratio as I think the original might have been a bit too tall.
Speedo seems to be about right, haven't checked it against sat nav yet but revs seem about right for the indicated speed.
The composite spring I fitted during the job is a big improvement on the steel original and at last the car sits level, I haven't a clue what poundage it is but ride is much better, also the adjustable strut rods made setting up the camber a piece of cake.
Thanks
Graham

Update after a year of running, change of diff ratio was well worth it, makes cruising much more relaxed, had a bit of a whine but this has quietened down with a bit of running so guess it is running in nicely.
Only problem I have now is with the clutch adjustment, I fitted a new LUK clutch kit complete as the upgraded input shaft had different splines, I fitted the new release bearing supplied with the kit but retained the original ball stud and release fork.
Problem I now have is that in order to get the clutch to disengage I had to wind the adjustment all the way to the end of the thread so I don't even have room for the second lock nut! I didn't remove the ball stud so I don't know what length it is but can see there are various lengths ranging from 1 3/8" to 1 13/16" so perhaps I need a longer one but whatever it is the gearbox will need to come out again :-(
Graham