No Spark

We are on the right track here! I twisted the rotor tab back to where I thought it should be. Hooked up the new coil and it tried to fire. Thought maybe the new coil was not powerful enough and hooked up the old coil. It made a weaker attempt to fire. Took off the distributor cap and tried to clean the center pin contact with a few swipes of sandpaper. Evidently that was not helpful as it now does not want to fire.

Do I need to ground the coil? That debate was very confusing to a newbie. Thanks!!!!