This is starting to leave a bit of a trail....
By dumping all the parts together in the same place at the same time is in my mind the thief is making a statement.
So we have someone who is involved in cars, local to western Sydney who wants XY mechanicals including the highly modified engine, gearbox and rear axle assembly. And also wants an older F Series cab. And who is extremely knowledgable with cars.
Who is located in western Sydney, needs XY parts, needs F Series parts and extremely knowledgable with cars, most probably specialising with Ford cars?
This is starting to stink.