M-code and 383 A-body plug wire question

I honestly don't remember but here are pics of the engine from 69 GTS. You can see the drivers side bracket at the back of the head but I didn't take a good picture of the passenger side. It has since been in a fire and I yanked the engine out so I can take pictures the next time I am at the shop.

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That’s what I’m looking for!! Thank you!