Couple of questions ...

On your converter, that looks like a balance weight for the converter itself, not an external balance for the engine, those are welded on the flex plate side. On your water pump/timing cover, up until 1969 the small blocks were driver side water pump inlet and cast iron water pump, 1970 and newer they switched to passenger side with aluminum water pump. As far as drive shaft, probably going to have to measure once motor/trans are in.