I checked out your page, you've done a lot of nice work to it.
But I hate to say it, it's not JDM. I lived in Japan 4 years, some of your info doesn't match up right.
Mainly by saying the engine is a 4ZE1 (Japan Spec)... The engine pictured is not a J spec 4ZE1, they look/are the same as US spec 4ZE1s, plus none of the 4ZE1s were ever turbo'd. The engine pictured does look exactly like the Isuzu Impulse RS's 4ZC1 turbo, which is a good swap, but only a 2.0L.
The other thing is the "J-Spec interior pieces (except the LHD part)." Are you saying that this was an actual RHD and was converted?
Ah, nevermind, I read through the comments a saw what you were talking about, but I still don't understand, because there's nothing JDM about the interior. The big give away is the body colored paint under the door trim. No JDM Isuzus have exposed paint there, they all have full door trim panels.
I know this is going to seem like I'm slamming the ride, which I'm not, it is very nice. Just don't like the mis-leading "JDM" term.