Haha glad you can play along.
Anyways 100,000km on a R33 is very very unlikely
Even if you do find one the chances of someone being able to prove to you its correct are slim.
Just do the usual checks and take it to a place to do a compression check.
All the cyl show around 155-160 then its fine.
Or you could buy a 34 for a good price.
Why do you want a 1997?