DOH!! I used Autolites. The miss was pretty close to what it is now the day I changed them out. The truck ran like a champ for a few days and then started throwing those 2 lean codes and that EGR insufficient flow code again. Eventually the miss came back and is gradually getting worse. Now it's right back to where we started and maybe a tad rough. But, make no mistake, the plugs and wires helped a ton right after I changed them about 2 weeks ago.