This is why I love the oople community so much. So much friendly knowledge.
There is an aluminium motor mount for a YZ 10 870 on ebay.
http://www.ebay.com/itm/1-10-ALUMINU...#ht_500wt_1180
This should fit my YZ 10? yes/no?
Finding a back brace or whatever you call the fiberglass spine may prove difficult. I will also need a center dif or whatever its called. Hence again, may just clean it up to the point of display. Will start a bit today and take pics. Everyone can watch what will prove to be slow progress . . . !