what volume oil pump

I went ahead an picked up a stock volume
hopefully I can bolt the top end up this weekend and get the pump installed aswell

one more quick question, is it at all possible to drop in the intermediate shaft wrong (say, 45 degrees off) and by doing so screw up the timing or will it always drop in right because of how it meshes?

(last thing I need is to prime the oilpump only to screw up the timing and still not get her to fire right up)