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An online calculator says the stock 265cc injectors max out at 172 crank hp with E85, which would be about 145 whp. This calculator doesn't take into account WOT AFR's, so YMMV.
We will give it a shot on stock injectors and go from there.
I think Emilio or Sav (or both) reported doing this many times before on n/a cars, though I think they were talking about na's running returnless 60psi fuel system. This will probably work