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What plugs do I use in my 074 heads?

841 Views 3 Replies 3 Participants Last post by  William Hennke, 
William Hennke
What number AC plugs do I need to use with my 074 aluminum heads?Thanks Bill.
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427L88
FR3LS, Autolite 3924/23 ...... the FR3LS number crosses to a new one...dont have it here, they're in the heads now...
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