Welcome to M3W ownership and TM. That is an early car. There really is no Maintenance Manual for the M3W, amazing as that may be in this day and age. There is an excellent S&S manual for the engine, available from several places but try this in the UK:

http://www.mattsmachineshop.co.uk/

They are very helpful for all S&S stuff I have found. There is an Illustrated Parts Catalogue that did have a link on TM some time ago for a download but I cannot find it now, anyone have it still? I have downloads of service check items, oils etc. I am sure Charles has this as well but PM me if you need the info and I will try and email it to you. Good luck.