according to a customs appraiser on PW - you can actually graft these cars with registered cars provided you dont mess with the part with the chassis no. engraving and the build plate
If I were to use them - I could "technically" get a legal and complete basket case- cut it up undo the spot welds and just save the firewall/bulkhead where the frame no. and build info plate is - then I could weld entire "chops" and these cars would be 100% legal.
because after being discussed - the concept of "frame" is non existant for "monocoque" cars. It was deduced only that "tampering" of chassis no. is considered illegal.
this is why - the tons of scrapped cars that are imported into Pakistan are 100% legal to be registered.