Several years ago I had the opportunity to tour the Richard Childress facility. Wow! No photography (no cameras or cell phones for that matter) allowed and they were real cagey about the heads. They too have a "rent-an-engine" program that comes complete with a mechanic and believe me, every thing down to the valve covers is wired shut I asked what they did with "old engines" to which the answer was "completely recycle" by which they meant "turn into scrap".

One thing that really stood out was the amount of micro polishing that took place on just about any rotating component in attempt to further reduce friction. The place was clean enough to eat from the floor and the employees were a very professional bunch. It just "smells" of big dollars throughout..