They're angled plugs, the dome is -14 Ross pistons, I don't own them or have any to look at, I think Andy may be right he has less compression than I will already & made plenty of power. I do only want to make a 10.00 car (for now) until I can figure out the rest & afford to run faster. I don't know any of those details yet, next season ill be at the track more often asking people.
Or asking you. But honestly I don't even know the questions to ask.