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.