Can I fit jaguar XJS complete front and rear axles to a Rover Vitesse.
I havn't got my Rover yet so just pondering ideas into the wind.

I don't think this would be easy. The 2 cars have very different designs. I had an XJS a year back so know a little about the 2 cars. The front suspension on the jag is completely attached to the subframe which is a very bulky item. The suspension struts on the Rover is attached to the body. The Jag front subframe would not fit under the inner wings.
The rear subframe may be a lot easier. I have seen a Jag XJS subframe but under a Jensen Interceptor, similar amounts of room.
Good luck if you do go for it.