I believe that here in the 'Car Capitol', 'factory' is usually taken to mean that it originated, in this case, with FoMoCo as opposed to having been put together in someone's back yard.
Sorry for coming off sounding dickish , Ive just never heard anybody use "factory" as a term for anything/everything built by or for the company, especially in the car capital or around anybody in the industry.
every time I've ever heard it used it been synonymous with OEM/stock
just like when talking to guys at the track or car shows...
person one: oh, man, sweet car, what do you have done to it
person two:nothing really, its all factory
person one: Jesus that was fact, its not all factory is it
person two: no way, its been fully built.
I definitely wouldn't call the facilities at any of the proving grounds where a lot of prototype work and testing is done a factory either.
factory's are only part of Ford, the factory's are where the parts and cars are assembled, there are also many other parts of Ford like offices, design studios, laboratories, testing facilities and so on. the factory didn't ask for those cars to be built, other parts of Ford did...
they've proven to be an amazing platform that has been remarkably reliable and capable of making loads of power.
could you imagine how bad ass it would be to have a termi powered LS!!! expecially after you got rid of its major problem and got a real blower like a Wipple or KenneBell! it would look amazing with a cowl hood to clear the blower or hell TT powered to keep the OEM hood. it sure would be nice if Ford would keep up with Cadillac.