No need for a lay out, just follow the wires from the cap. Only the third one is kinda hard to find and that link I provided shows you the easiest way to do it. Just use the right tools and be careful, you do not snap one off in the block trying to be in a hurry or getting frustrated. Also remeber the wiring, I did one at a time to make sure I did not mess up the firing order. Or you can label the wires as you replace them so you know which plug it goes to. That would be easy too.