I always wondered about the air gap at the rotor/cap interface.

About 16 yaers ago, I had a Toyota Landcruiser parked a remote mountain hiking trail. I took the Rotor with me on the hike (to prevent vehicle theft)

I thought I was smart and crafty. Well, the thieves were smarter than me. They stole another rotor from another parked Toyota car, and drove away.

When I recovered the vehicle (without a 12 gauge shotgun), the Rotor was 1/8" SHORTER than the original. I drove the Landcruiser over 200 miles before I discovered the "swap".

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1970 280S M130 engine- good runner
1971 250 M130 engine- #2 rod bearing, gone
1971 280SE (blown engine,parts car)
1977 German 280S W116-only 33 years old