First, decide how much power you want and the engine will tolerate. This will give you an idea of pressure ratios.
Then sit down and figure how much airflow you need to get this power. This will give you a place to start looking for compressors.
Then you fab up a turbo flange to fit to the header, and do some cutting and welding. Make sure the turbo is located above the oil in the sump. And then bend up some tubing for the exhaust and silencers (if used). You MAY need to add a support bracket for the added weight and heat distortion - you may not.
Your will need oil lines to and from the turbo.
You will then need to fab up some tubing between the turbo and the intake - including a new airbox/plenum and seal this for the pressure that will be used.
Next you will need some way to enrich fueling under boost, and make sure the injectors and fuel pump will support the power level with correct pressure and flow. Wayne Macdonald has a Tuneboy Advanced just for this, but I don't know a lot about it other than a few e-mails.
Then you will need to fab up a bracket and filter for the turbo inlet.
Last you need to tune.
Then you get to ride the $hite out of it. ;D
Not all inclusive, but I hope it helps. I have been looking into this.
