273 4bbl, carb replacement?

toolmanmike said

Sorry but N9Y's for the 4 barrel engines. Photo is out of my 66 factory service manual. (and we aren't talking about 340's here).

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Hah, I should have been careful in doubting you. The 66 FSM would trump the 68 Motors Manual in my mind. Do you have a 72 or 73 FSM? Now I'm curious what plugs they specify for the low compression 340's.