Timing mark positions

Discussion in 'Engine Topic' started by Layne02, Sep 1, 2019.

  1. Layne02

    Layne02 Veteran Member

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    I am wondering about timing mark positions on sbc’s. I have always seen them at the 2 o clock position for the most part, but I have an 87 305 that has it at 12 o clock, and an early 80’s 350 that has it at 12 o clock. My question is when did this change go from 2 o clock to 12 o clock. Thanks
     
  2. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

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  3. Layne02

    Layne02 Veteran Member

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    Ok cool , thanks. I did a search but didnt come across this one.
     
  4. GoldenOne7710

    GoldenOne7710 Equal Opportunity Offender Lifetime Gold Member

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    If you use an aftermarket balancer and timing tab, you can always use a piston stop to check the accuracy if the engine is already assembled and in the car. If it's off, you can use timing tape on the balancer to correct any variance.

    I'm running both an adjustable timing marker and aftermarket balancer. Mine was spot-on when it was installed, but I ended up using timing tape anyway since it's a lot easier to read when setting the timing.
     

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