Plug gap and pinging??
Motor is Ford Racing 392 stroker with CR of around 9:1, aluminum GT40 heads, forged pistons, MSD ready-to-run distributor but NO MSD box.
I have Motorcraft AGSF32C plugs, as came with the motor from Ford. I have just fitted new ones, exactly the same, and the motor is now pinging on acceleration which it was not before. I have set the gap at .045" as I have no info on what it should be. Is this too wide? There is no ignition box, just the MSD distributor. Could too wide a gap cause pinging? I have changed nothing else.