OEM Spark Plug Number - Big Block

Does anyone have the Mopar part number for 440 spark plugs? I know they were probably made by Champion (J11Y), but what was the factory equivalent? Thx in advance,KK

1968:
J-11Y 2642913
J-13Y 2642475
J-14Y 2444870

1970:
Same numbers for Champion plugs, but they also had Chrysler brand spark plugs. Let me know if you want those part numbers.

Bob

From the 70-71 Factory Parts book.

Who made the Chrysler and Mopar branded spark plugs?

Bob and Snoop,thank you. The 34P also confirmed my question about application. As to who made their plugs? I had always heard that it was Champion.

So, what did FACTORY installed plugs have for markings?
Champion ? Mopar ? 34P ?

My Dad said the OEM Champions that were in our '70 383 Road Runner had green marking on them.

Champion was the OEM supplier for the Mopar plugs.I have a few boxes of the Mopar plugs and they have P-34P for a part number on the box.

Quote:

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So, what did FACTORY installed plugs have for markings?
Champion ? Mopar ? 34P ?

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Bill the factory installed Champion plugs in the motors. Big Blocks would have J11Y's in them when new. The Mopar plugs were just over the counter.