Basic question about dist. cap and rotor

[surreybc]

re. 1992 240sx



1. Timing question: I had my distributor out today as I was removing timing chain guides. I have the crankshaft postioned so timing pin points at the tdc mark on pulley. My distributor rotor is pointed at the no. 4 cylinder. I assume this is ok? Just 360 degrees off?
2. The picture below shows my dist. cap. It seems to be missing the center piece? The would start but ran extremely weak and smooth. I put another dist. cap on but car would not start at all. I assume my battery is weak.


3. this is my rotor. never seen one with a hole in it but it has worked.