LQ4 heads, cast iron vs. aluminum

Discussion in 'High Tech Retrofits' started by Paul1979, Sep 12, 2011.

  1. Camaro-Chevelle

    Camaro-Chevelle Veteran Member Lifetime Gold Member

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    I have another question. What are 823 castings?
     
  2. 79cam6.0

    79cam6.0 Veteran Member

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  3. 79cam6.0

    79cam6.0 Veteran Member

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    that shows the difference between the iron head engine and aluminum
     
  4. Protour-Camaro

    Protour-Camaro Veteran Member

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    Rect L92 heads
     
  5. 79cam6.0

    79cam6.0 Veteran Member

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    and the early 6.0 uses the long crankshaft that does not use a crank spacer. you can not run a 99+ 4l60e behind one of those. it will work with any older trans and 4l80e.
     
  6. Camaro-Chevelle

    Camaro-Chevelle Veteran Member Lifetime Gold Member

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    Are the 5364 cylinder heads aluminum rectangular port heads? How are they different from the 823 cylinder heads?
     
  7. Camaro-Chevelle

    Camaro-Chevelle Veteran Member Lifetime Gold Member

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  8. TheMeat

    TheMeat Veteran Member

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    IMO, I would pay the extra $200 for the aluminum headed version.

    If you're not getting a killer deal on this engine though and it might need a rebuild, I would look into a newer L92 with low miles. Probably cheaper in the long run! (ask me how I know)
     
  9. Camaro-Chevelle

    Camaro-Chevelle Veteran Member Lifetime Gold Member

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    I purchased a LY6 and 4L80 out of a 2009 2500 Van with 20,000 miles on it. The setup is complete with the TCM, wiring and all accessories. The motor has aluminum 823 rectangular port heads. I also purchased the LY6SS camshaft from Mast Motorsports. This should be a great combo. I will keep everyone posted.
     

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