Put a #56 jet in it.
I think stock is a #51 in a Targa...and if you just slam a BiTurbo on there. get a #54 and a #56, put the #56 in, and if it runs good, ok...if it's just a little rich (four strokes, etc) - try the #54.
BT tends to lean it out a bit, so go really easy on it.
You might also wanna up your oil intake by an extra 1/2oz per gallon.
And I checked the wir a minnit ago...the WHITE wire goes to the very center clip in the back of the headlight...the one hanging loose should have two GREY wires goin into the clip.
Hope that helps some,