spark plug gap for msd

MSD 6AL on mine and i run Autolite Racing AR 3910's in my 408.I gap mine at .042 and i can go from now on with a set of plugs if i want to,but i change them each season for good measure .No fouling issues with the Autolites.I have ran Champions ,A/C's,and Bosh Platinums in this motor and they all burnt the electrods off within 20 passes .Autolites are the "Shizzle" IMO...