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  1. #1
    My Boats:
    was a 1989 scarab
    Join Date
    Mar 2001
    Las Vega NV USA

    ot: Help Timing question for sbc400

    On my Car I have a GM hei and I need to know the initial and what should the total be with the vaccum hooked up.


  2. #2
    Registered SteveS's Avatar
    My Boats:
    Warlock 27WC F1-36
    Join Date
    Feb 2001
    Verona Beach, NY USA
    Should be 4BTDC w/o vacum @ idle, or I believe 2BTDC if it has Cali emisions.

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