by Drew Peacock Sat Feb 23, 2013 3:07 pmWhen looking to get a replacement cylinder head, I need to identify whether I have a C5 C6 C7 or C8 head. Where would I find this casting number? The van is a 67 with a 170. Thanks
3 posters
Cylinder head casting number? where is it?
Drew Peacock- Number of posts : 63
Location : Jersey
Registration date : 2012-08-21
Barnabas- Vintage-Vans Listings Manager
- Number of posts : 2011
Location : Raleigh, NC
Age : 64
Registration date : 2011-01-16
On top of the manifold behind the carb
Seth G likes this post
Barnabas- Vintage-Vans Listings Manager
- Number of posts : 2011
Location : Raleigh, NC
Age : 64
Registration date : 2011-01-16
Your 1967 should have the C7 head. The parts book lists the C9DZ 6049-G as the replacement for 1967.
Drew Peacock- Number of posts : 63
Location : Jersey
Registration date : 2012-08-21
wow - thank you - ill look tomorrow morning to confirm - do you know what the numbers mean in terms of difference between each other?
Barnabas- Vintage-Vans Listings Manager
- Number of posts : 2011
Location : Raleigh, NC
Age : 64
Registration date : 2011-01-16
I'm looking at the truck parts book, so they don't list everything that was installed, but list the replacement part.
What this means is that if you went to a Ford dealer to replace a 1967 head, they would give you a 1969 head.
The 1963 head C3OZ 6049-K is recommended for 1964. (smaller valves)
The 1965 head C5DZ 6049-B is for 1965 and 1966 without T/E.
The 1969 head C9DZ 6049-G is for 1966-1968 with T/E.
The 1969 head C9DZ 6049-F is for 1967-1968 with IMCO.
The valve length was the same from 1964-1970
The head diameter of the valves became larger in 1965, but stayed the same from 1965-1970.
I don't know if there were any other differences that would make a difference. The combustion chamber size might be different, changing the compression ratio, but that is not indicated in the parts book.
What this means is that if you went to a Ford dealer to replace a 1967 head, they would give you a 1969 head.
The 1963 head C3OZ 6049-K is recommended for 1964. (smaller valves)
The 1965 head C5DZ 6049-B is for 1965 and 1966 without T/E.
The 1969 head C9DZ 6049-G is for 1966-1968 with T/E.
The 1969 head C9DZ 6049-F is for 1967-1968 with IMCO.
The valve length was the same from 1964-1970
The head diameter of the valves became larger in 1965, but stayed the same from 1965-1970.
I don't know if there were any other differences that would make a difference. The combustion chamber size might be different, changing the compression ratio, but that is not indicated in the parts book.
chrlsful- Number of posts : 184
Location : Amherst, MA
Registration date : 2014-04-22
Block:There's a MAJOR difference that DUZ have meaning:Barnabas wrote:I'm looking at the truck parts book, so...
I don't know if there were any other differences that would make a difference.
'64 & lower hasa sm "dizzy-bottom hole" so must pretty well keep the SCV/LOM feedback system. '65+ = ability to use DSII, other, w/modern components. Most think of hop-up @ carb only. Ignition is the other 1/2 of the equasion in performance (that is pep AND MPGs). Machining or reworking the dizzy can B done but either is a chore. Do not B fooled by DUI's price. The ford is not quality (o ring leaks oil, other probs).
Head: changing carb hole
(℄
of bolt spacing too) size, area volumn, valve size.https://fordsix.com/ams/small-six-specs-144-170-200-250ci.9/
chrlsful- Number of posts : 184
Location : Amherst, MA
Registration date : 2014-04-22
get what U need Mr Peacock?
up-date s ???
The first two digits were the production year, the second two digits were the model.
The first digit (always a letter) was for the decade - C=60's - D=70's - E=80's
The second digit (always a number), was the production year.
For example: C3 is 1963 - C6 is 1966 - D7 is 1977 - E0 is 1980 - E2 is 1982
up-date s ???
The first two digits were the production year, the second two digits were the model.
The first digit (always a letter) was for the decade - C=60's - D=70's - E=80's
The second digit (always a number), was the production year.
For example: C3 is 1963 - C6 is 1966 - D7 is 1977 - E0 is 1980 - E2 is 1982
Last edited by chrlsful on Tue Jan 09, 2024 2:02 pm; edited 1 time in total (Reason for editing : spelling)
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