I also concur that most of the interior has been redone.
Also the door panels look very close to originals, possibly recolored to match the new seat and dash covers.
Wood is not original as the end that leads to the A post is not tapered like the original.
Dont think they had green foam for the seats back them(seen in the split).
However the carpet tunnel may be original, but definitely keep the shifter boot ring.
That is an original and NLA.
If getting a new carpet set, transfer that ring to the new set.
Also, not sure if there should be a scuff pad on the gas (clutch) pedal area on RHD cars. I know there is on the LHD cars.
My .02 cents, if it's worth anything.
Walter