The guys in our group who all have 400s in their cars and also use a Pertronix or equavalent set their plugs at .050 and they all claim that is dead on etc....
.050 was recommended to me too.
There's 2 other components that need to be identified to really answer this. For me anyway.
Plugs - Good plugs can handle increased gap and will change my recommendation Wires - Good wires can handle more voltage, will definately change my recommendation
