always reeplace the disc if you've got it apart - saves opening it again in 6 months - good idea to have the pressure plate and flywheel resurfaced too
need a pilot shaft to line things up before you put the trans in, like the input shaft from an old trans - to get the flywheel off, wedge the flywheel using the perimiter teeth, and use an impact wrench to break all the bolts loose
make sure the pilot bushing is ok too!!
Bill