Questions on Ignition shield bracket screws/bolts #274430 - NCRS Discussion Boards

Questions on Ignition shield bracket screws/bolts #274430

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  • Keith M.
    Very Frequent User
    • January 16, 2021
    • 663
    #1

    Questions on Ignition shield bracket screws/bolts #274430

    So I need these and am trying to reconcile a few things.

    1) I have found these on several sites in at least three different styles...mostly to do with the washer...see some links below. Doc has them with washer integral to the head. CC, Tracy Corvette and others have them as a lock washer. Corvette Pacifica, Heart Beat City Camaro have them with a star washer. What is the correct configuration?

    2) Most are shown with a zinc type finish...a few in black. What is correct finish?

    3) Lastly, bonus points...how many do I need for a 69 L46? Per page J204 of the AIM I see four. Doc says 6.


    1958-1982 Corvette Lower Ignition Shield Mounting Bracket Screw Repro Of GM 274430
    https://shop.docrebuild.com/1958-1982CorvetteLowerIgnitionShieldMountingBracketScrewReproOfGM274430.aspx
    1958-1982 Corvette Lower Ignition Shield Mounting Bracket Screw Repro Of GM 274430 CAVEAT EMPTOR: these are Zinc plated Indented Hex Washer Head Screws mount the lower park plug shields to the block. NOTE: 58-75 use 6 pieces; 76-77 use 5 pieces; 78-82 use 4 pieces. 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982


    1956-1979 Corvette Ignition Shield Bolts (GM Part 274430, 9409107)
    https://www.zip-corvette.com/56-79-spark-plug-heat-ignition-shield-bolts.html
    Find 1956-1979 Corvette Ignition Shield Bolts at Zip, complete your C2 Corvette restoration with correct ignition shielding & mounting hardware. (GM Part 274430, 9409107)


    Just a moment...
    https://www.corvettecentral.com/57-82-ignition-shield-bracket-spark-plug-heat-471070


    1957-1982 Corvette Ignition Shield Bracket 274430 Spark Plug Heat Shield Bolt | Tracy Performance Corvette Sales, Parts and Service
    https://store.tracyvette.com/item/13501/
    This is for One New Reproduction  Corvette Ignition Shield Bracket 274430 Spark Plug Heat Shield Bolt        Fits Corvette Model years: 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982   This is for a set of six bolts, E head mark, zinc finish. 1/4 -20 Bolt for mounting ignition shield brackets clips and spark plug heat shield to engine block. These recessed head, shield bolts are 1/4 inch x 20 x 1/2 inch. They have a captured split lock washer.


    1968-1974 Camaro Spark Plug Wire Shield Bolts GM# 274430
    https://www.heartbeatcitycamaro.com/19870/68-69-70-71-72-73-74-Camaro-Spark-Plug-Wire-Shield-Bolts-GM%23-274430/
    1968-1974 Camaro Spark Plug Wire Shield Bolts GM# 274430: Camaro spark plug wire or exhaust manifold heat shield bolt kit, for small block only, asse
    ***************
    late Oct 1969 L46 350/350, M21 4spd, 3.70 posi convertible --As with life, restoration is a journey, not a destination. Though restored cars provide both journeys AND destinations!
    Tags: None
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    • Sal C.
      Very Frequent User
      • November 30, 1984
      • 430
      #2
      Re: Questions on Ignition shield bracket screws/bolts #274430

      Lock washer style is correct.4 for the heat shields, 2 for the rear plug wire brackets.
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        • Keith M.
          Very Frequent User
          • January 16, 2021
          • 663
          #3
          Re: Questions on Ignition shield bracket screws/bolts #274430

          Sorry but I think I misstated in the title a bit...and can't change it now..274430 is for the sparkplug wiring brackets. p J204 of the AIM. Shows 2 for the rear brackets/supports (#3744408) and 1 each for brackets #3923971 and 3864498.
          ***************
          late Oct 1969 L46 350/350, M21 4spd, 3.70 posi convertible --As with life, restoration is a journey, not a destination. Though restored cars provide both journeys AND destinations!
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            • Joseph S.
              National Judging Chairman
              • February 28, 1985
              • 848
              #4
              Re: Questions on Ignition shield bracket screws/bolts #274430

              My Vote is for the CC, Zip, Tracy style.
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