Finished replaced the two gaskets and the sound still persists but now you just hear it towards the muffler. It does seem to not happen as often after warming up, if at all. Then when I apply the gas in either park or neutral it pings again. Would a high idle be the cause also? I noticed when I'm in park or neutral my idle is about 1750 but in drive or reverse it drops to 1000. Which seems a bit weird to me.
The metal brackets don't seem to look like a good seal but its solid all the way around, they were bent before I had replaced them for the copper gaskets.