Ok, so just over the past few days I have managed to get in my new ACDelco Iridium plugs, MSD 8.5mm plug wires, new Bosch O2 sensors, and cleaned the EGR valve. I ordered the block off plates so the EGR wont be there much longer.

Even after all this it seems the truck still gets a bit of high RPM and WOT pinging, and under normal accelerating its just not pulling like it did when I first got the 93 tune from Allen. Do you guys think this could be false knock from the 99 PCM, or something else I need to look for.

Thanks,
Chris