360 Won't Start!!

Ok guys thanks! I think I understand MOST of everything haha. My only other question is about the Dizzy. When you guys say pick it up and turn it around do mean I have to actually take the whole distributor OUT from the block, or do I just loosen the hold down bolt and turn it 180?
67Dart273-
The pistons aren't that much bigger so I can't believe they would be hitting the valves or anything... but I'll try this timing stuff and then move on from there! Thanks everyone, i'll let you know what i figure out