Weird thing is that with many imports, there is no note of the engine number on the log book, it's merely shown as "not known". Your's was an import but had one, hence they had to change the engine number.
Of course this could all be a bit of a red herring.....It may be that the only thing of the stolen car that does not belong to your car is the bodyshell.....I am not sure they can prove anything else, as all other parts, (even the aftermarket parts) could be generic.
It may well be you can claim back everything as yours, and leave the shell to the insurance company. MAybe you could then buy it ( the shell) from them as "stolen and recovered."....Just updat ethe log book wiht the new engine nummbers and you have a legit car, albeit one with an interesting history.....!
Of course this could all be a bit of a red herring.....It may be that the only thing of the stolen car that does not belong to your car is the bodyshell.....I am not sure they can prove anything else, as all other parts, (even the aftermarket parts) could be generic.
It may well be you can claim back everything as yours, and leave the shell to the insurance company. MAybe you could then buy it ( the shell) from them as "stolen and recovered."....Just updat ethe log book wiht the new engine nummbers and you have a legit car, albeit one with an interesting history.....!