I can clear a few things up. It is a RHD XJ for sure. Engine bay component placement, steering, steering whee, stereo, as well as the 4 switch bezel give it away. So I'm gonna say you are looking at a UK XJ here, best guess at this point. Also good eyes on the LHD WJ dash; the fact that it fits between the A pillars intrigues the hell out of me. As far as everything else goes, I haven't a damn clue. Should have pulled the VIN, that'd help a little bit.