I have helped several buddies with a 180 degree problem, the easiest,quickest way to determine if you are 180 out is to flip all your wires 180,straight across the cap from one another. If that solves the problem THEN pull your distributor and flip it 180. How did I figure this out? That is what I did with my first engine rebuild 28 years ago, and luckily an old timer was watching, and flipped my wires and she popped right off. He, however, suggested that I leave it that way, just to mess with the next guy who might work on it. 😀