ping at high speed or foot to the floor

I have ran a couple tanks of gas, increased the AVS door spring tension and the ping is gone. Put the vacuum canister back to original setting and connected the vacuum to the constant side and still no ping. I am now going to move the timing back up from 14* to as near to 18* as possible. Looks like I got it solved, thanks to everyones help. "A bodies only" rules.