I completed a build a bit back and have several things that I didn't use related to an LS3 motor.
1) One oil pan brand new with windage tray, and dipstick.
2) One flexplate with bolts
3) One evap unit with hose and bracket
4) One oil pressure sensor
5) One water pump
6) One idle wheel tension type
7) One idler wheel regular
8) One power steering pump with resevoir
9) Various bolts and brackets I didn't use
I have photos of all parts and pieces and I can send part numbers if you wish. All parts are genuine AC Delco and are brand new.