Another item off the list ticked today.
540iLE kindly allowed me to keep the 3.23LSD as my old diff started making some very odd deep vibrating noises going round bends. Thanks!
The tag on the diff that came out was marked S3.91.
Thanks to a kind member of E30zone who fitted the diff for me.
The difference can only be described as a +ve move in the right direction.
Gearing is spot on now and the car is much nicer to drive. I find acceleratioj to be better as I am not wasting time changing gears all the time. I had a short motorway cruise and it's so much better in 6th.
All that remains now is to remove the M5 badge at the front, sort out the red calipers and buy some bew headlight surrounds to alleviate me of the cheese grater effect.
My car is now getting to how I really like it and I am very likely to hang on to it for a few years now. Really is the best car all rounder I have ever driven and the ebst car I have ever owned. Not even the mighty Alpina B10 V8 tempts me anymore.
Thanks again to 540iLE for understanding my situation.
Sal