Hi
There are some useful downloads, probably the best collection on the the net.
http://www.greatlakesxj.com/tech.html
The parts catalogs at greatlakes include info on diesels, though some of the numbers have been modified.
Lundgh.com has some use full stuff, though it is again an american site so little on the diesel engine.
If you are willing to part with some bucks there are several sites you can down load from. If I find anything else will keep you posted