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Author Topic: How far into 71 were "X" heads used?  (Read 223 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




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.
1970 AAR Cuda
1970 Gran Coupe Ragtop. 1 of 66
Gran Cpe Convertible 1 yr only.

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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

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