I this a normal function caused by the waisted spark and/or the valve timing overlap. It is only at light throttle cruse configuration. I have no decel popping and the plugs look perfect. short and long term fuel trims are within the 10% window.

Under any acceleration it clears up. most of the time it is at 1500-2500 RPM when you here it.

Parts in the motor
710 cam
Slow bleed lifters
Beehive springs
HD pushrods
Gen 4 head gasket
Stock valve size but bowl ported (.013 off the heads to make then flat and remove imperfection)CR should be 9.8-9.9
ROE throttle body
K&N intake with Unifilters
Mopar racing 3 inch exhaust (no cats)
170 Deg T-sat
93 Roe tune for the above items

I have not been to the dyno yet, and I can't locate my wideband O2. I may just pick up a new one.

Thanks for any input!