Chevrolet Oval Port Big Block Chevy Heads Casting Numbers - BBC

Discussion in 'Hi-Perfromance Engines' started by HotRodCarts, May 1, 2017.

  1. HotRodCarts

    HotRodCarts Administrator Staff Member

    Chevrolet Oval Port Big Block Chevy Heads Casting Numbers - BBC - GM

    OVAL PORT - Valve size 2.06 intake, 1.72 exhaust

    330864 1970-81 366/427/454 Open . .
    330865 1970-84 366/427/454 Open . .
    330866 1968-78 366/427 Open . .
    330867 1968-73 427t Open . .
    336765 1973-84 427/454 Open . .
    336768 1973-76 427t Open . .
    336781 1973-85 454 Open 113cc .
    343771 1968-85 366/427/454 Open . .
    343772 1976-84 366/427/454 Open . .
    343783 1975-78 454 Open . car & truck
    346236 1975-87 454 Open 113cc .
    346238 1975-87 454 Open 113cc .
    352625 1970-76 454 Open . truck
    353049 1970-73 402/454 Open 113cc .
    366725 1974-78 427 . . .
    473328 1968-85 366 Open . .
    3856206 1965-66 396 Closed 97.2cc 325
    3856213 1966-70 366 Closed . truck
    3856260 1968 396 Closed . truck
    3872702 1966 396/427 Closed . 325, 360 L-34/L-35 390, L-36 98.4cc
    3876875 1966-70 427 Closed . truck
    3904390 1966-67 396/427 Closed . 325, 350 L-34/L-35 390, 400, L-36/L-68 98.4cc
    3904393 1966-68 366 Closed . truck
    3908952 1967 427 Open . truck marine
    3909802 1966-67 396/427 Closed 109cc L-34/L-35 L-36/L-68
    3917215 1967-69 396/427 Closed 109 325, 350 335, 385, 390, 400 L-34/L-35
    3917219 1966-70 366/427 Closed . truck
    3931063 1969-70 396/427 Closed 109cc 325, 350 335, 385, 390, 400L-34/L-35
    3933148 1969 366/396 Open 122cc 2V/427 265 car & truck
    3933149 1969-70 427 Open 122cc truck
    3935401 1968-76 427 Open . .
    3964280 1966-70 427/454 Closed . 335, 385, 390, 400 LS-5
    3964290 1969-70 396/402/427/454 Closed 109cc 325, 330, 350 400 ls-5
    3965198 1969 396 . . truck
    3975950 1968-70 366/427 Closed . truck
    3986133 1970-85 366/427 Closed . truck
    3986135 1969-73 366/427 Open . .
    3986136 1970-84 366/427 Closed . truck
    3993820 1971 402/454 Open 113cc 300, 330 LS-3 365 LS-5
    3999241 1972 402/454 Open 113cc 240, 300, 330 LS-3 365 LS-5
    6272292 1971 402/454 Open . 240, LS-3 270, LS-5
    10052902 427 Open . MKIV
    10101136 1991-94 454 Open . truck
    10114140 1991-up 366/427 Closed . gen.V
    10114156 1991-up 454 Open 118cc gen.V
    10121033 1978-88 454 Open . truck
    10141279 1996-up . Open 100cc Vortec7400
    10487052 1977-90 366 Open . .
    12352783 1979-93 454 Open . truck
    12363391 1996-up . Open 110cc aluminium MKIV gen.V gen.VI
    12558162 2001-up 496 Closed . VII Voretc 8100 truck
    12560241 1998 -up . Closed 100cc Voortec 7400
    14025175 1983-93 454 Open . truck
    14081044 1986-90 454 Open . truck
    14081045 1978-87 454 Open . .
    14081052 1985-87 366/427/454 Open . truck Marked HIPERF
    14092359 1986-89 427 Open . truck
    14092360 1985-89 454 Open . truck
    14101398 1986-90 454 Open . truck
     

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