How does a liner get turned out of place in an engine?
One of those mysteries in life right up there with how some of those desks in grade school had holes drilled in the desk tops by ball point pens...some went all the way through.

I wonder what method West uses to weld their headers? If it's done right, the weld should be stronger and more crack resistant than the parent metal.....in this application nothing [TIKO]beats gas welding with hydrogen.