I replaced it 4 days ago. It was the worst plate that I have seen. I had no gasket left. If the ping doesn't go away I will be pretty pist. I love the truck but hate to get discoraged with it after all the work done with replacing the gasket and plate. Maybe I expect too much. Perfection.
I just did mine last weekend. I had some pretty hefty pinging, and my gasket was blown in 2 - 2inch spots. I replaced mine with the aluminum Hughes kit, but I also did the intake gaskets, plugs, wires, cap and rotor, and my pinging went away, so it could be a combo of the lot or maybe just the plenum.