Once you remove the LPG kit the engine is useless as air is going to get drawn into the engine where the LPG injectors once were.
Depending where the injectors have been located the new owner will be looking at a good few quid for replacement inlet manifold etc.
Car will need trailered away, have you stated this in you ad? (couldn't be bothered to read it at this time of night)
Whole car is for sale (less LPG kit and rear seats), looking for offers over £550. In Elland West Yorkshire 07525 237 007 Adam
sorry but that scrap price is higher than most discoveries with MOT's sell for. especially V8's
Try £250/300 and you would be approaching a proper price.
and before ya say owt Just bought a complete 3 door L reg disco 7months mot no rot, blown engine. For £350.