I see that three different thickness of washers are in the kit. What if none of the washers orient the plug correctly. Can you use two or more washers to get the correct orientation?

Since the valves are at 12:00 to the spark plug, how close do you try to clock the spark plug gaps toward the valves?
11:00-1:00? 10:00-2:00? 9:00-3:00?

Thanks