Hi Drayvn,
We're still working on it with AAM, they're developing the RHD manifold to accommodate both 350z HR and 370z to make the project less costly / cost effective. So virtually, as soon as the manifold is ready and test fitted, it will work for both 350z HR and 370z.
We're shipping more parts to AAM today so they can have a full working RHD setup in house, things like front frame, steering rack etc.
Hopefully not very long now, as there is a huge interest in the kit, having so many PMs, emails and texts about it
Adrian