HLS30 stands for left-hand drive. That RHD cars are wearing this chassis code appears to be ok only in the UK and applied to top-end cars. I still maintain that such a modification equates to a major change in 'identity'...
Flawed logic and poorly thought-through opinion.
Yes, the L in the 'HLS30' chassis prefix indicated Left Hand Drive, but that doesn't stop the car from being modified. There's also a power unit identifier in the code, and that doesn't preclude an engine change/type swap.
The 'identity' of the car - as defined by the manufacturer and as defined by the vehicle licensing authorities in most developed countries - is the chassis prefix and body serial number combination issued to it when it was made. It is non-transferable, non-negotiable and unalterable.
So is there a conclusion to this Thread?
Yes. The car in question is a ringer. It fits the definition to a tee. This is a car which has had its original identity removed, and another identity attached to it. It is not a 'Re-shell' as that is simply not possible with these cars (Nissan has never supplied replacement S30-series Z unibodies without their own identities). It's a wrong 'un.
At this stage that's the vendor/owner's problem. If somebody buys it, and is oblivious to identity swap and its implications, it could be an expensive mistake.