Don't forget injectors, boost controller, wastegate, ECU and a tune. You'll also need a Z32 airflow meter unless you're going with a MAP sensor. The 10mm spacer is put in between the turbo and the manifold to prevent the compressor housing from touching the cylinder head. Just fabricate a new down pipe that will bolt onto your existing exhaust system, but you'll need a V-band flange to attach onto the turbo.
Then there's the clutch to support the power, tyres and wheels for traction, possibly coilpacks etc
You didn't mention if it's internal or externally gated. The process is a lot simpler and cheaper if it's internally gated.