cool project Russell, nice meeting you at SEMA. Watch out for those brass 90 degree fittings coming off the gas tank, they are quite restrictive compared to the mandrel bent full flow 90's the AN companies offer. Not good to restrict fuel on a twin turbo setup, plus any restriction is tough on the electric fuel pump(s). May not cause you an issue, but if you notice fuel pressure dropping with the boost turned up check those first.
Then again, I'm not positive that's the fuel tanks, so if not................... never mind.

Maybe they're oil tanks for the turbos, not using engine oil to feed?
Jody