JEM reckon my car will make 350ish when i go back to E85, after i fix a couple of issues (that i told you about the other day Luke)
Realistically if you want 400 -9's will struggle as well...you'll either need -5's or a nice single. considering a precision turbo is cheaper than -5's id just do that, get someone to fab you a manifold.
In saying that i'm weighing up my options for my next turbo, because im a stubborn flamin mongrel and a but of a "purist" ill be sticking with 2 turbos....
If the motor is healthy you should be able to push around 350kw on E85 with the -7's. Spend the extra cash on the diffs, and enjoy.
350-400KW, Quaife front Diff, modified transfer case, nismo rear diff=ultimate street car IMO