427 smog hole threads - NCRS Discussion Boards

427 smog hole threads

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  • Mike T.
    Very Frequent User
    • January 1, 1992
    • 568

    #31
    Re: 427 smog hole threads

    Terry, Joe, John - Those are some clever ideas and I'm no longer thinking about the old AIR 'extensions' I tossed, I now have alternate ways to 'plug and seal' the Dorman Bigblock exhaust manifolds I'll be ordering. An earlier reply mentioned Grainger as being a source for the 1/4"-18 National Straight Pipe Thread taps, I assume they'd also be a source for the actual plugs?Thanks, Mike T.
    Mike T. - Prescott AZ.

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