there is a way to make this story legal
as anil has told above
only tampering the chasis is not legal
this is easy to do on
mercedes, crown, cressida, hilux, land crusiers, pajero
and this also has an international law
cuz many cars are built on each others chasis
like hummer on GMC chasis
mini on rovers/fiat chasis
vauxhall on OPEL chasis
and many many more examples