Besides rereading this thread for other issues you have not considered...
All I am going to say is look inside the engine bay of a V6 Contour once and I'll leave it at that.
If it were really as simple as you make it sound it would have been done long ago. Trust me.
With everything at their disposal even Ford used a remote mount location for their concept car.
I really wish it was as simple as mounting it on top of the engine.