go for a t3/4 hybrid if you dont want external gate.
injectors well get the power fc first then a z32 afm and an djustable fuel pressure reg. but b4 you do that run you car down the 1/4 wit the mods you have you might get asurprise I ahve heard of rb25 sil's cracking the 12's with a stockish set up
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sounds good so have you driven it yet?