I agree that its likely timing advancing too much. That's what caused problems for me when I stabbed in my new mp distributor and it had 55 degrees advance built in. Why mopar performance sells em like this is beyond me. The felpro should be fine at your level. The cometics are good but believe me they can be a pain to get to seal. So I don't recommend them unless you really need em. And at 11.2 I don't believe its necessary.