It's currently set up to match the highest-performance FD RX-7 as that was the safest way to get close to what may have been intended for it. I can always tweak the values in later versions if I think they need it though.
Yes, but nothing to show off really. My focus is on research and tooling to make it possible to apply the mod to all three versions of the game without having to effectively make three separate mods. My time is limited though, and split between this, GT2+, and other projects. GT1+ is a relatively low priority as it didn't get a lot of interest but I've already ticked off a lot of what I wanted to achieve with it, so I'm working on it for my own satisfaction more than anything else.