I am about to buy a 1985 635 for parts only. I have two 6ers. One 86 and the other 88.
I am going to part this 85. It has a very strong engin and auto trans.
Just e-mail me if you like, and let me know about the parts that you may be needing.
I am not a mechanic, so you may have to do the parting youself.
Bahram, aka ben (in Dallas)