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    Super Stock® alternator crankcases for 1970-'84 big twin, 35⁄8" Bore with small diameter flywheels

    Item #: 31-0071
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    $1,154.95
    PowerTerms

    The S&S Super Stock alternator style crankcases are perfect for stock replacement and for high performance applications. Pre-clearanced for strokes up to and including 5 inch. S&S Super Stock crankcases are compatible with stock 1970-1999 flywheel assemblies, primary covers, gearcovers, and clearanced for 38 amp alternator stators. 1970–1984 big twins. Natural finish. Available for stock, 3 5/8", and 3 13/16" bore applications.

    Stock. . . .31-0003
    3 5/8". . . . 31-0004
    3 5/8"Bore (small diameter). . . .31-0071
    3 13/16". . . .31-0030

    NOTES:1981–'84 style oil pump. Includes primary scavenge port machining. Machined for 1970 & later alloy primary.

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    1981-’84 style oil pump. Includes primary scavenge port machining. Machined for 1970 & later alloy primary