Hi
I've just rebuilt a 2.9i which had done around 130,000 miles. Not sure what the service history was but I found that the main thrust bearing had almost completely fractured, cutting a groove into the crankshaft which gave 5mm endfloat. Had to find a new crankshaft which took me a while. Surpisingly, everthing else seemed in reasonable shape.
Not easy to get any spares from a Ford main dealers but I managed to get everything I needed from:
a local factors
http://www.donorspares.co.uk http://www.fordpartsuk.com/ https://www.burtonpower.com
Hope this helps
Mike