that looks awesome !
But I can not recognise where the exhaust exhaust of the turbo is?
The intake of the exhaust gas from the engine has a wide flange into the turbo.
Would it be feasable to route two separate downtubes in parallel into the flange ?
Of course not ideal for the exhaust flow, but it will pressurise the intake “rotor” of the turbo as well.
Think that would look nice and doesn’t need that much space than a single inlet tube with larger diameter.
I have no idea about turbos, blow through carbs and I rely on your experience 😉
Have fun !