This is very similar in size to what I have, though I did all 3" charge piping to match the 3" inlet on my NA manifold. The .57 A/R is slightly smaller than mine which is a .63. Should spool a little better than what I have, but be aware it will be slower to spool than stock even with more fueling, however you will gain some top end. I would try to find an internal wastegated turbo, as mounting an external wastegate would require welding a flange of some type to the factory manifold, which is cast and not the easiest thing to weld. T3 flange is standard, so no worries there.
Jason
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