No way I'm getting involved with anything Motorex was involved in.C10's are good to just come on in due to 25yr law.
Then depending on the build date, R32's are now allowed w/o anything really needing to be done due to 25yr law.
As long as the R33 is a true Motorex car, you're fine.
Some R34's snuck in under Motorex as R33's so there's some that you don't need to worry about. Otherwise just apply the 'show & display' deal should be good for a year or so. IDK, seen a few tagged on the street.