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    Author Topic: How far into 71 were "X" heads used?  (Read 1454 times)

    Offline mcemond

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    How far into 71 were "X" heads used?
    « on: June 20, 2017 - 11:09:26 AM »
    I'm trying to put a lot of my cuda back to factory original and read that they used X heads in '71 until they ran out, then switched to J heads. Mine was built Jan 21st '71. Are there any examples of X heads factory installed after that date?
    Thanks
    Mike
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    Offline 1 Wild R/T

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    Re: How far into 71 were "X" heads used?
    « Reply #1 on: June 20, 2017 - 04:03:46 PM »
    Very few 70's got X heads, most got J's... I doubt an 71's got X heads....
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    Offline AARuFAST

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    Re: How far into 71 were "X" heads used?
    « Reply #2 on: June 20, 2017 - 08:43:13 PM »
    Interesting.
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    1970 AAR Cuda
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    Offline mcemond

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    Re: How far into 71 were "X" heads used?
    « Reply #3 on: June 22, 2017 - 02:59:50 PM »
    So even in '70 most 340's got J heads? Like on all non AAR's or something? This kind of backs up my thinking as I've got J heads on my donor block currently but a set of x heads set aside as well. The few articles I've read about x heads in 71 made me think, why not ask and see if they are correct?
    Thanks
    Mike
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    Offline teslasbrain

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    Re: How far into 71 were "X" heads used?
    « Reply #4 on: June 22, 2017 - 07:29:30 PM »
    Yeah, most of the MOPAR websites and books claim that 71 was the first year for non T/A J heads, but in fact it was 71.

    http://board.moparts.org/ubbthreads/ubbthreads.php/topics/2163056/1970-340-heads-non-t-a.html
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