That doesn't seem right to me since you are using an MSD box.
From what I understand the Mopar pickup is basically the same as the MSD pickup and MSD recommends a setting of .018" to .030"
http://c452191.r91.cf2.rackcdn.com/images/bccx/image/84661_frm30015.pdf
That being said those pickups have a permanent magnet and over time that magnet can lose some of it's strength which will result in a weaker trigger signal.
