360/408 10.26:1 compression (actual), MSD 6AL ignition. Using Autolite 3924 plugs @ .035"
gap. I've been told to gap at 0.045 as 0.035 is too little and may cause fouling and/or poor performance. Anybody have any research or experience with this?
I don't even bother to check the plug gap anymore. I use NGK plugs and screw them in right out of the box. They seem to always work great. I do use the OEM style plugs with the wider gap since I figure that is the modern way to go. NGK 6987 is what I use with aluminum heads.