Jaguar XJ6 IFS - A-body swap...

I am interested to know if anyone has done this or put much thought into it. I plan to set my car as low as possible, so my next measurements to take will be from the ground to the "flat plane" that the frame rails will sit on. That will be key of course, but if the car sits too low, you could certainly make spacers to sit up high enough.
You could potentially build this cradle to bolt in just as our factory K-frames do as well.

Of course a multitude of clearance issues may arise..
Headers, oil pan, steering, etc..

Anyone know the wheel mounting surface to surface dimensions on our A-bodies?