If this is for the ecotech 1.8, don't waste your time.
The end results don't justify the hassles.
Here's basically what you need.
mounting bracket between charger and bracket on engine
replacement cambelt roller bracket on engine, and now it gets annoying.
you will need a longer cam belt, (about 2 teeth longer), new cambelt rollers with enlarged centre bores (for the bigger bolts that sit in the bigger holes on the new replacement cambelt roller bracket).
You get the idea ?
Stick a 3.0 V6 in there instead. It's what the former owner of my supercharged 2.0 16v engine put in his bay when he had the charged engine removed.