Yes, there are handful of skylines, gtst, with big horsepowers. Im sure the distinct white gtst im refferring to puts out more than 300rwks'. btw, aint clints and joels both rb30's?
In regards to regency, nightcrawlers on the money when he's referring to getting your car actually on the road. It can be a long and frustrating journey if heavily modified which seems to be the case indicated by the mods you listed. But than again each import is inspected differently.