Casting codes
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Junior User
Joined: Mar 2002
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From: Montrose USA
Casting codes
I have found a few buildable 400s that I am going to go look at tomorrow. I am wondering if there is any difference between castings. Are some better than others? Thanks for any input.
Elder User
Joined: Sep 2001
Posts: 887
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From: Jax FL
Casting codes
so far all CF castings are good
MCC castings before march 19 1977 (i think) crack in the lifter valley
DIF well i have seen of 3 so far, no issues on mine.
there was a block change in 1977 that made the webs stronger, also a 1973 block that has the fmx bellhousing.
MCC castings before march 19 1977 (i think) crack in the lifter valley
DIF well i have seen of 3 so far, no issues on mine.
there was a block change in 1977 that made the webs stronger, also a 1973 block that has the fmx bellhousing.
Senior User
Joined: Dec 2001
Posts: 356
Likes: 0
From: space city
Casting codes
>...look for a D7TE or D8x block to build.
>
the above only applies to MCC blocks, right?
are all 400 cranks the same?
are all 351m/400 rods are the same?
FWIW: i noticed on the 2v 351C heads i have, there is a "2" cast into the flat surfaces at the corners, just outside the valve cover rail. the 400 heads i have don't have anything there. don't know if this is on all of them, or just the ones i have. the exhaust ports look the same to me, so maybe looking for the "2" is an easy way to find the 2v heads...
>
the above only applies to MCC blocks, right?
are all 400 cranks the same?
are all 351m/400 rods are the same?
FWIW: i noticed on the 2v 351C heads i have, there is a "2" cast into the flat surfaces at the corners, just outside the valve cover rail. the 400 heads i have don't have anything there. don't know if this is on all of them, or just the ones i have. the exhaust ports look the same to me, so maybe looking for the "2" is an easy way to find the 2v heads...
Elder User
Joined: Sep 2001
Posts: 887
Likes: 1
From: Jax FL
Casting codes
>>...look for a D7TE or D8x block to build.
>>
>
>the above only applies to MCC blocks, right? actually no the D7t3 or D8 blocks were the stronger blocks. the only part that applys to MCC blocks is the cracking in the lifer valley.
>are all 400 cranks the same? yes
>are all 351m/400 rods are the same? yes
>
>
>FWIW: i noticed on the 2v 351C heads i have, there is a "2"
>cast into the flat surfaces at the corners, just outside the
>valve cover rail. the 400 heads i have don't have anything
>there. don't know if this is on all of them, or just the
>ones i have. the exhaust ports look the same to me, so
>maybe looking for the "2" is an easy way to find the 2v
>heads...
yes 351c 2v heads have a 2 cast in the corner
351c 4v heads have a 4 cast in the corner
351m/400 heads have no casting in the corner, its reported that some have a dot cast in the corner.
>>
>
>the above only applies to MCC blocks, right? actually no the D7t3 or D8 blocks were the stronger blocks. the only part that applys to MCC blocks is the cracking in the lifer valley.
>are all 400 cranks the same? yes
>are all 351m/400 rods are the same? yes
>
>
>FWIW: i noticed on the 2v 351C heads i have, there is a "2"
>cast into the flat surfaces at the corners, just outside the
>valve cover rail. the 400 heads i have don't have anything
>there. don't know if this is on all of them, or just the
>ones i have. the exhaust ports look the same to me, so
>maybe looking for the "2" is an easy way to find the 2v
>heads...
yes 351c 2v heads have a 2 cast in the corner
351c 4v heads have a 4 cast in the corner
351m/400 heads have no casting in the corner, its reported that some have a dot cast in the corner.
Posting Guru
Joined: Aug 2000
Posts: 2,416
Likes: 4
From: PacNW
Casting codes
>>...look for a D7TE or D8x block to build.
>>
>
>the above only applies to MCC blocks, right?
Ford made some changes to the D7TE and D8x blocks to strengthen the main webs so that's why I'd use those blocks. They take a different main bearing than a 1976 & earlier block.
>are all 400 cranks the same?
>are all 351m/400 rods are the same?
As far as I know the answer is Yes to both of those questions.
>>
>
>the above only applies to MCC blocks, right?
Ford made some changes to the D7TE and D8x blocks to strengthen the main webs so that's why I'd use those blocks. They take a different main bearing than a 1976 & earlier block.
>are all 400 cranks the same?
>are all 351m/400 rods are the same?
As far as I know the answer is Yes to both of those questions.
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