This is cool. And I've got an idea.
How about using N/A exhaust manifolds possible better flow? and remount a smaller turbo like TD04HL - 12A combo for quick I mean QUICK boost off the line Then also change over to a T3/T4 for some heavy breathing in the mid to uppper range nothing that huge on boost like 15psi on the huge turbo and 10 max on the little one.
An idea I got from this:
would be a bit of work to impliment but would gain lots from quick PSI on take off.