Interesting about the pickup touching the pan with some degree of interference (the 1/16" to 1/8" as above), to keep pressure on the pickup. I have read that when the /6's came out, that was not being done at the factory and the pickup were just touching the pan. Customers supposedly complained about the odd noise from the lower part of the engine that would come and go. Can't recall if there was a TSB on that or not.....
Fast forward: Guess who installed a /6 pickup that was just touching the pan, and who now has a funny noise in the lower part of his /6? LOL