You need all the dowel pins. They are what actually locate the pressure plate on the flywheel, the bolts just provide the clamping force to keep it on.
Is this for first time alignment, or to maintain alignment while it's installed? I'll have to drop the flywheel and get 2 dowels reinstalled.
Both clutch kits, pressure plate tab holes do not line up to the flywheel. New one was for an 11" flywheel but holes were above the old, so I think I need a 10.5" actually. The initial kit I purchased was for a 10.5" but I feel like maybe it was smaller overall for the pressure plate due to it being for a GT possibly, not sure. Threw me off, that's for sure.