1993 XJS V12

It could be done. You would have to make some changes to the front firewall and also the transmission tunnel, (the six-speed tremec gearbox is large) and reposition the rear gearbox mount holes. The prototype V12's were just altered standard DB7 shells, which were in turn identical chassis wise to the XJS.

 

I think think that would be awesome! Nothing like an XJS with 450 hp. Might not be a bad project.