In your case absolutely. We found even with duration as small a
[email protected] on a tight LSA, 106 to 108, they responded to locked out timing. Unless you are running less total timing currently, start at about 36˚ and work up 1 at a time watching the plugs ground strap. The heat line should be mid way in the bend of the ground strap. Start with fresh plugs. Also stop and go back 1 if the ET or MPH falls off.