The chassis no. engraved into the firewall will be missing. The only chassis identifier no. is then on the rails itself. This chassis no. placement is well known by everyone in Pakistan for toyota vehicles, so it will create a problem. The ID of the car will also be different, meaning that - you cannot put a suzuki SA310 ID plate with everything matching onto a Bolan and think it will work because SA310 is a suzuki khyber ID.
There is something going on about body change cars in Pakistan because these bodies are actually of illegal scrap cars which duties have not been paid on, so technically your rolling chassis is only legal... Someone with excise and taxation experience can explain better.
In simpler words its like cutting out the chassis no. of your corolla and welding it onto a another corolla. You know for sure that does not work.
