Guys,
Thanks for the advice, to answer you:
M25: The car has the original spax coil overs on it, which are not adjustable. As they are only some 9000 miles old I am reluctant to change them, but am thinking of stiffening the settings and putting in another rubber bumb stop. I agree your point re clearance, but i think that will always be a problem especially as i have a weakness for flying over humpback bridges!
Madmal: I shall email JW
Johnjulie: Yeh, I am considering this, but still trying to work out whether I can drop the sump with the engine in situ. There appear to be two nuts at the back which are buried in the bellhousing.
Thanks guys, keep the faith!