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did 250 engines have large or small flexplate

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by R72K5, Sep 30, 2003.

  1. R72K5

    R72K5 Banned

    Mar 5, 2001
    Likes Received:
    central IL
    around 69 model year trucks with 250, small or large ? IE 153 tooth or 168 tooth?
    what was factory/correct ?
    this block only has one starter nose bolt pattern, they are straight across design, no way to install a staggered bolt starter nose on this one,
    i would think 153 tooth

    original tranny behind it was probably 3 or 4 speed, but i have as thm200c behind it now with 153 tooth plate/

    i gotta find out anything at all, please lemme know if you know of anyone or anywhere that would know or know how to find out anything on this, im trying to find a starter for this thing

  2. dyeager535

    dyeager535 1 ton status Premium Member

    Dec 13, 2000
    Likes Received:
    Roy WA
    I think you've discovered it...you need the staggered pattern to fit the 168 nose cone on the block IIRC, so if you can't mount a staggered nose cone, I don't see how a 168 flywheel could have been used.

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