Reading this forum I discover my gaskets are installed wrong. Both square corners are facing the firewall in the upward position. My question is "did ford ever install them like this? Explain again why it causes overheating besides the obvious. Also I have a frozen spark plug which a short while ago was easy to remove twice. Now all of a sudden its frozen. Any tips on how to remove it? How far does it extend into the open cylinder beyond the threads? As always, thanks for your expertise. Charlie