Start soaking everything around and about the mounts in WD40, Rustlosser or whatever to free things off. Getting the lock tabs undone was my main problem if I remember...oh and get some proper Bearmach or Genuine NOS rubbers the pattern ones are made from the wrong (too hard) rubber which gives a lot of vibration plus I found them to be a bit weak and managed to tear one apart....
I'm led to believe that you can use Disco1 rubbers instead which are meant to be better - I might give that a go on my LWB project if the rubbers look like they need replacing...