Here are some parts that might be usefull:

-glow plug relay;
-OVP relay;
-Fuel sender unit (even if it is inop, a good cleaning is often all that is needed);
-Vacuum pump (these are getting rare to find);
-Injectors (maybe a bit much, but I wouldn't mind having and extra set);
-Vacuum reservoir (all vacuum components really).

There maybe more, but that all that was on the top of my head.