WTF, I had no problem getting all of them off but now the rear cylinder Clips seems to be tight.....Is there something I need to do that I am just missing something?

 

Make sure the inner pushrod tube is seated in the o-ring and pushed up all the way. Also be sure the lower pushrod tube is not caught on a cooling fin. You may have to slip a screwdriver behind the tube to prevent it from catching on a fin when you press against it to install the clip.