I have sort of solved the problem by buying a 740 Turbo. Here it is:
http://cgi.ebay.co.uk/ws/eBayISAPI.d...ndexURL=0&rd=1. Don't call me crazy because I know that already.
George
'87 745 GLE Turbo Diesel Intercooler
'89 440 GL 1.7 (Looking for Turbo)