See my post in this thread for info on float height and setting the primary metering rod tree.
https://board.moparts.org/ubbthreads/show...rue#Post7292199Adjusting the primary metering rod tree will not affect air/fuel ratio at full throttle, only at part throttle. Tune your primaries by checking spark plug color if you don't have a wideband oxygen sensor. If you are still getting ping, you might need to back your timing down a little. Are you running vacuum advance on your distributor? If so, try adjusting the vacuum advance can with an allen key, you might just have too much vacuum advance coming in too early.
