Spark plug gaps

in my stocker, with msd 7al, run .060 gaps, also, use a standard length plug, not a extended tip plugs, also can run more timing , this is a 72 340. at track , opened up gaps from .045 to .060 ran .05 faster and .75 mph faster. btw, i use NGK plugs. just food for thought. btw it's a B8es plug