weird firing marks in distributor

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Joined
Apr 8, 2015
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Location
Upstate NY
My Car
71 Mach 1, 351c 4v, C6 trans, grabber blue with white interior
I replaced a distributor cap recently and the one I removed is the attached pic. Are these normal marks for the inside of a cap? I always thought they should be more in the middle of the terminal as opposed to one sided like these are.

This is on my 71, 351c, factory engine and distributor. Using Pertronix II with flamethrower 1.5 ohm coil. Timing is currently 10 BTDC, no vacuum advance, 17 with vacuum advance.

Does something need to be adjusted?

DistCap3.jpg

 
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