IMO I'd find a cleaner shell and convert the LHD to a RHD using all of those rare parts if you really want a RHD car. I couldn't imagine that body being worth it with all of that rust in the back panels.
You got a really good deal on the badges dash, etc etc.
About the rarity of the car...
Mr. Mike T was showing me and Chris some pictures at Branson of him hanging out with some Z cars clubs in Japan - Guess what I saw?
A group of LHD cars, because that's what they want over there. I was very surprised. LHD cars over there are rare, and are very desirable, but over here you can get a running LHD S30 for $1000 or less. It's all about the market. The "keep it stock because it's rare" arguement doesn't hold much water.
Plus this is Hybrid Z.