Not knowing the history of the car, i cant really say what the last owners did. I'm wondering if the cap is numbered wrong, everything i saw on line told me the firing order of the motor, but didnt compare it to distributor cap.

I took this picture from a different thread, but thats how my cap is numbered also.
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84 300sd 2.47 dif 360k
26 mpg needs lots of love
given to me in pitty
89 civic hatchback auto 140k
33mpgs soon to be low to mid 40's
been in the family since mile 1
85 300d with unknown knock. driven over 30k with knock and still going. sold for $800