I was having a small issue with my first gear pulls and would see misfires and erratic needle swings on my tach gauge. This usually signifies something with the MSD setup and started with the distributor cab. As I pulled off the plugs, this is what I found ( position for cylinder 5 ):
Taking a wire brush, I cleaned it up and the inner contacts as well. Put it back together and fired it up and damn, it runs smoother now.
