I have a GS300 with a full Aristo swap. Precision 67mm single, full bolt ons, ati super damper, aluminum pulleys, aero motive pump, regulator, rail, Siemens 575cc injectors. I'm looking to go stand alone or piggyback. I'm weighing my options as I have basically no wiring skills. I don't mind having a tuner install the hardware but I would rather be able to do it. I know that the vvti acts differently from a regular gte so I'm curious as to which methods of engine management offer what pros and cons. My goals are around 650whp (or whatever the current fuel system will support).