Thanks for making the prettiest header flanges in the world--the world needed that. Seriously, it's great to see that you are back working on this beast. Sites like this one are seriously lacking in substantive contributions, and your tool-making stuff is the kind of awesomeness that really adds here.
You're probably already aware of this already, but your pipe routing is sounding like it will go in the direction of Mike DuSold's Camara (purposeful mispelling), which is also a twin-turbo setup, with the turbos located right around the footwells. This sounds creepy thinking about it, but hey, it's working for him, and his car is awesome, for a Cameero (purposeful misspelling).
For really cool and purposeful turbo routing/intercooling (single, not twin), check out Paul Faessler's Mustang setup (limits passenger butt space, but whatever):
https://grassrootsmotorsports.com/ar.../break-maiden/. Faessler's son road races a late-model setup that I think has twins, but I'm not sure (Google). Keep at it!