The oil pump shaft stuck because of deposit build up on the exposed shaft above where it run-in the block. This is normal. Coat it with solvent, penetrating oil, ATF, etc and clean it before trying to remove it. You do not want to damage the bore in the block for the shaft.
The cam gear is cast and may crack if you pull it from the out side edge. Best practice is to remove the crank gear and use a press and suitable supports to press off the cam gear close to the centre.
Mark the connecting rods carefully as to position and orientation. I stamp the rod, cap and block so it is obvious how it fits for reassembly.
Rod/piston/sleeve assemblies are removed before the crank. Do one at a time and COVER the any exposed rod stud/bolt threads. It all too common to find crank journals damaged by rod threads! I usually cover them with shrink tube.
I'm not keen on driving out the sleeves from the bottom. You can damage them, as you did, and they can also easily crack. Still use heat but pry them out from the top.
