To aid in reinstalling the fuel pump, pull out the pump rod and coat it with wheel bearing grease. There is a plug just below the pump opening which will allow you to remove the rod. You may be able to reach in and put the grease on the rod without removing it. When you push the rod back up in place, it will stay put long enough to let you put the pump in place. If you do remove the rod, examine it carefully to make sure it hasn't worn. When we put the 413 back together in my 300L, I had to replace several "failed" fuel pumps until we discovered that the rod had worn and thus was too short to make the stroke. I know this could all be taken the wrong way in a different context--just keep your minds out of the gutter......:) Cheers, Roger