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my brain is mush

This is a discussion on my brain is mush within the Internal Engine forums, part of the LSx Technical Help Section category; are the 862 cast 5.3 heads pretty much the same as 243 heads with a smaller combustion chamber? orrr are ...

  1. #1
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    my brain is mush

    are the 862 cast 5.3 heads pretty much the same as 243 heads with a smaller combustion chamber? orrr are they more like the 241 head?

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    cutting and welding mark21742's Avatar
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    Quote Originally Posted by emotionalpiracy View Post
    are the 862 cast 5.3 heads pretty much the same as 243 heads with a smaller combustion chamber? orrr are they more like the 241 head?
    all of them are basiclly the same casting with very small differences. the 5.3 heads have smaller combustion chamber than the 241's, the runner are more closed off (just means alittle more grinding when you port them out), and smaller valves.

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