My suggestion, just don't put it on. State law here too, but not too many cops bother you about a tag violation. I would think that when they see the car with the cervini kit they would cut a little slack. The kit is a conversation piece and I'll bet as long as your cool with the cops, they'll let the tag slide.
I have the Cervini kit too (just came this week). I'm not putting a license plate on the car up front. I haven't had one on any of my vehicles over the last 6 years. I have been written only once. It was a compliance ticket, so I wire tied the thing to my grill, then took it back off after going in to show them I complied.
