Just because you live in a city/state that doesn't have smog/emissions checks doesn't mean the car doesn't have to be OBD II compliant.
The R33 is eligible for importation (1996-1998 models), and the NHTSA has released the information for the modifications that has to be done for the body/chassis.
Bringing in a car in "kit" form is just a way around, but still not legal.
Many members that own Skylines in the states have done this, and are perfectly happy doing so.
We encourage you to really read up on all the posts and the article that can be found here,
http://www.nicoclub.com/articl...shtml before taking any action importing one.
We never say don't do it, we just want the prospective buyers/owners to be aware of what could happen and to understand what some RI's or other importing companies may tell you in regards to "legalizing" your future purchase.
It's a topic that has been discussed many times over, and there is lots of good information in this forum.