You can see they have the torsinebar mounted like in e-type, but it goes the hole way thou the chassie, See the new mountings they hav made for the T-5 that is in this car. I think Jaguar mounted the engine in four rubbermounts in the forward frame chassi, and one leaver at the gearbox.
This is something I have read about to, but I have never seen a picture of the rear mounting. The front mounting is where the alternator or the power steering pump is on later model of the xk/xkj engine, but where did they place the rear mounting?