1. MightyMats

    MightyMats Member

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    Good Afternoon FCBO,

    I was replacing my radiator in my 67' 300 today and I decided to pull off a valve cover and see what the casting numbers on my heads were. I was hoping for the 915 closed chamber heads but that is not what I found.

    Instead I found the numbers 2406518. I had never seen those numbers before so I had to look them up. Well after extensive research I found out that the heads are from a 426 Max Wedge. Apparently they are the later stage 3 castings. They have all the correct markings and rocker towers.

    So I went to Ebay to see if I could find a pair for sale and I couldn't find any.

    Can any of the guru's on here give me an idea of what these things are worth? I don't believe they have any cracks in them and they are in good shape.

    Thanks for looking.
     
  2. 69CoronetRT

    69CoronetRT Senior Member

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    Easy enough to determine...

    1. Confirm the casting is in fact 518 and not the expected 516.

    2. Measure the exhaust valves. 518 = 1.88. 516 = 1.6

    3. Check the casting dates on the heads.

    4. Proceed from there......
     
  3. MightyMats

    MightyMats Member

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    They are most definitely 518 castings
     
  4. 69CoronetRT

    69CoronetRT Senior Member

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    Ok. Casting date?
     
  5. MightyMats

    MightyMats Member

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    I guess this may seem like a stupid question but where is the casting date located? There is the number "11295" screwed into the head on the intake side on a plate but that doesnt seem like a date code to me.

    Edit: I'll check the front of the head but i'll have to get all the grime off it.
     
  6. MightyMats

    MightyMats Member

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    I might have to eat my words. The more i look at it, the more is looks like a 6. I dont know why someone would put 518 heads on a chrysler 300. I kind of resembles an "8" but i think i have my doubts.

    20190707_165520_HDR.jpg

    20190707_165322_HDR.jpg

    20190707_165801_HDR.jpg

    20190707_165637_HDR.jpg
     
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  7. stubs300

    stubs300 Senior Member

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    That's a 6!
     
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  8. Lefty71

    Lefty71 Member

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    It's a 6, and those are mighty wimpy springs for a '518 head. Now how am I gonna get my blood pressure back down?? :eek:

    The easiest way to know is if the rockers appear straight, like plain rockers.... a '518 head would have offset rockers, with pushrods moved over to clear those enormous ports.
     
  9. MightyMats

    MightyMats Member

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    Beer?
     
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  10. Lefty71

    Lefty71 Member

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    Someone put "J" heads on a 300, and that's even more rare than a '518 head, so who ever knows???

    Thx, I'll take 2
     
  11. CBODY67

    CBODY67 Senior Member

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    Sometimes, casting numbers can be a bit "soft", so "6" might be an "8", or similar. Sometimes, have to look closer or even get a tracing. In this case, other things would have had to have been present for it to have been an "8".

    It was fun while it lasted!

    CBODY67
     
  12. MightyMats

    MightyMats Member

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    It also has the heat cross over, apparently the 518s didnt.

    So back to my previous question. How much are 518 heads worth.
     
  13. Lefty71

    Lefty71 Member

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    I think this is the last set we saw come up, that were likely real.
    FOR SALE - MAX WEDGE INTAKE & HEADS ORIGINAL

    Pity he doesn't have the rockers and shafts on it, so you can see what I mean by offset.
     
  14. MightyMats

    MightyMats Member

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    Thats a lot of money for heads. thanks for sharing those are super cool
     
  15. MarPar

    MarPar FA1 FCBO Gold Member

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    jaw hitting floor.gif
     
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  16. jbooth35

    jbooth35 New Member

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    If anyone is looking I have a set of Stage III heads. I also have the intake with the carb linkage, but without carbs. I brought them out to Carlisle last year, but never got them out of the car to sale.