Author Topic: What is the earliest date C8OE-N CJ head have you seen?  (Read 2679 times)

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Offline redscj

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #15 on: May 18, 2019, 12:12:25 am »
   Grant I had a dealer cost plus 10% deal back then and the heads were $53 ea Bare with intake valves ( as they were serviced) as I recall. List was like $76. The parts were fine but the valve seats were "sunk" when compared to an assembly line head. They were for an NHRA "Stock eliminator" car and it took allot of 'manipulation" to get them to flow well and still be "legal". A service 428 block was about $300 my cost and a 427 SO ( hyd lifter) was $465 back then.
     Randy
     Thank you. As I remember. I paid around $200 in late 1975 for a used set. They had all the seats & valves ground plus the guides replaced. I had to throw in a set of 14 bolt 390 heads also.
Grant
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Offline preaction

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #16 on: May 21, 2019, 02:58:59 pm »
Pics of the heads from the 2/14/68 Cougar.
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Offline 161854

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #17 on: May 21, 2019, 06:26:19 pm »
  Notice how crisp the date and casting numbers are . Later heads are often harder to read and get really blurry.
Thanks for the pics.
     Randy
68 1/2 CJ FB San Jose white/blue "C" stripe Foulger Ford
 66 GT350 Hertz SFM 6S 477 white/ blue side stripes 1  of 18
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Offline ccarney69

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #18 on: June 08, 2019, 08:36:07 am »
My 68 GT-E Cougar with a C14 build date has a pair of the N heads with the 8B2 date code. The cars VIN is stamped on one of them.

Offline RoyceP

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #19 on: June 08, 2019, 09:27:04 pm »
To clarify, Chris this is your W code GT-E correct?


My 68 GT-E Cougar with a C14 build date has a pair of the N heads with the 8B2 date code. The cars VIN is stamped on one of them.
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Offline ccarney69

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #20 on: June 08, 2019, 10:48:55 pm »
 Yes Royce, that is correct. 8F91W549497

Offline RoyceP

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #21 on: June 09, 2019, 07:27:55 am »
Right, so this is a known example of the 14 bolt C80E 6090-N head being documented in a production vehicle. I suspect the scheduled build date was February 23, 1968 or later?

Yes Royce, that is correct. 8F91W549497
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Offline ccarney69

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #22 on: June 09, 2019, 08:09:20 pm »
Yes, 14C and actually built on 12C.

Right, so this is a known example of the 14 bolt C80E 6090-N head being documented in a production vehicle. I suspect the scheduled build date was February 23, 1968 or later?

Yes Royce, that is correct. 8F91W549497

Offline RoyceP

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #23 on: June 09, 2019, 11:05:20 pm »
Makes perfect sense and matches what we know about the C8AE 6090-J heads being replaced by C80E 6090-N heads in production.


Yes, 14C and actually built on 12C.

Right, so this is a known example of the 14 bolt C80E 6090-N head being documented in a production vehicle. I suspect the scheduled build date was February 23, 1968 or later?

Yes Royce, that is correct. 8F91W549497
1910 Model T Ford Touring Red
1915 Model T Ford Touring Black
1914 Model T Ford Touring
1917 Model T Ford Torpedo Green
1968 Mercury Cougar XR-7 GT-E Green 427 W Code
1968 Mercury Cougar XR-7 428CJ R code 3.91 C6

Offline 161854

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #24 on: June 10, 2019, 10:16:12 am »
   Royce ,
       Do you have an idea/ guess as to how many ( besides the 50 "135" ) engines were built with the C8AE-J heads? It would be nice to find a "change level" document like is out there for the 289 engines ( referencing the Bob Mannel book). Also of interest would be what was the first GTE to get 16 bolt heads? ( Assuming it was a GTE and not a Mustang).
    Always appreciative,
     Randy
68 1/2 CJ FB San Jose white/blue "C" stripe Foulger Ford
 66 GT350 Hertz SFM 6S 477 white/ blue side stripes 1  of 18
3 magazine covers- Car Craft July '77,  Modified Mustangs Feb '11 , and June '14 Mustang Monthly
'78 F350 Oleynik racecar hauler

Offline JSOHC

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #25 on: June 10, 2019, 11:12:30 am »
I just found a 8B7 one and the other I can't make out that I had put up. Both 16 bolt. Also a 8B13 C8OE 14 bolt.
Jack in Ga  :)
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Offline ccarney69

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #26 on: June 10, 2019, 11:24:17 am »
 Looking through some pictures of the heads, the one with the VIN stamp is a 12 bolt pattern on the exhaust flange and the other one is a 14 bolt pattern. Both dated 8B2.

Right, so this is a known example of the 14 bolt C80E 6090-N head being documented in a production vehicle. I suspect the scheduled build date was February 23, 1968 or later?

Yes Royce, that is correct. 8F91W549497

Offline RoyceP

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #27 on: June 11, 2019, 11:12:59 pm »
The 427 engines never got 16 bolt heads. That was reserved for the 428CJ engines.


   Royce ,
       Do you have an idea/ guess as to how many ( besides the 50 "135" ) engines were built with the C8AE-J heads? It would be nice to find a "change level" document like is out there for the 289 engines ( referencing the Bob Mannel book). Also of interest would be what was the first GTE to get 16 bolt heads? ( Assuming it was a GTE and not a Mustang).
    Always appreciative,
     Randy
1910 Model T Ford Touring Red
1915 Model T Ford Touring Black
1914 Model T Ford Touring
1917 Model T Ford Torpedo Green
1968 Mercury Cougar XR-7 GT-E Green 427 W Code
1968 Mercury Cougar XR-7 428CJ R code 3.91 C6

Offline RoyceP

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #28 on: June 12, 2019, 07:09:42 am »
Regarding your "How Many" question, all of the 427 Cougars were built with the C8AE 6090-J heads until about mid February 1968 when the C80E 6090-N heads started to appear on the 427 engines. February 1968 is when most of the 427 GT-E Cougars were built, and most got the C8AE6090-J heads. I am unaware of any documentation other than the cars themselves which exists. From a practical standpoint we are talking about maybe 300+ of the 427 Cougars got the C8AE 6090-J heads originally, and likely less than 50 of them may have come with the C8AE 6090-N heads in the unusual 14 bolt pattern. It is a lot easier to find C8AE 6090-J heads in either the 8 bolt or 14 bolt configuration than it is to find the February dated 14 bolt C80E 6090-N heads. It is easy to document that no C80E 6090-N heads were cast prior to February 1968, and equally easy to determine that no C8AE 6090-J heads exist with casting dates newer than December 1967.


   Royce ,
       Do you have an idea/ guess as to how many ( besides the 50 "135" ) engines were built with the C8AE-J heads? It would be nice to find a "change level" document like is out there for the 289 engines ( referencing the Bob Mannel book). Also of interest would be what was the first GTE to get 16 bolt heads? ( Assuming it was a GTE and not a Mustang).
    Always appreciative,
     Randy
1910 Model T Ford Touring Red
1915 Model T Ford Touring Black
1914 Model T Ford Touring
1917 Model T Ford Torpedo Green
1968 Mercury Cougar XR-7 GT-E Green 427 W Code
1968 Mercury Cougar XR-7 428CJ R code 3.91 C6

Offline 161854

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Re: What is the earliest date C8OE-N CJ head have you seen?
« Reply #29 on: June 12, 2019, 10:22:44 am »
   Yes I am very aware that 427s never got 16 bolt heads, the "production run" had all been built before the 16 bolt head became a reality. I was hoping you had narrowed down a date on the transition . I put headers on a couple of 427 powered GTEs before I did a 428 and noticed the (CJ) manifolds were (obviously) different. I wasn't paying attention to "numbers" in '68 ( except my draft number).
   Randy
68 1/2 CJ FB San Jose white/blue "C" stripe Foulger Ford
 66 GT350 Hertz SFM 6S 477 white/ blue side stripes 1  of 18
3 magazine covers- Car Craft July '77,  Modified Mustangs Feb '11 , and June '14 Mustang Monthly
'78 F350 Oleynik racecar hauler