Gt3076 is all you need. Has already been proven to make over 400whp on pump gas. You also get a good spool with that turbo also.
SVT: Topmount GT3582R, SAE ? Whp ? Tq, Built motor, stock head, new #'s coming soon ;)
ZX3: RACE GAS 602whp 501tq Pump Gas SAE 454whp Garrett GT3582r, Topmount, built motor, Ported head, both Tuned by Fernando@RacingPartsSolution