68 f100 400m headers
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
blue, since there were no 400s installed in 68 there no headers available for a 400 in a 68. The 400 was offered in 77-79, so finding a set that you can use for those years should work fine.
John
John
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
Sorry, I can't help you further, I have never run a M engine.
I recently saw a 400 in a 66 with headers, and as my prior suggests they were used in the later 70s trucks. The engine bays are almost identical from 65 to 79, so headers should fit.
My first thought is that the engine is not on the right perches since it is a retro fit, or you don't have the headers that you think that you do.
Where are you located, there could be a reader close by that might drop by and give you a hand with your problem.
The correct headers should fit on the 400 in a truck correctly fitted. IMHO
John
I recently saw a 400 in a 66 with headers, and as my prior suggests they were used in the later 70s trucks. The engine bays are almost identical from 65 to 79, so headers should fit.
My first thought is that the engine is not on the right perches since it is a retro fit, or you don't have the headers that you think that you do.
Where are you located, there could be a reader close by that might drop by and give you a hand with your problem.
The correct headers should fit on the 400 in a truck correctly fitted. IMHO
John
Posting Guru
Joined: Nov 2003
Posts: 1,230
Likes: 0
From: East Flat Rock NC
oldblue68
Welcome to (FTE)!
I have not installed headers on a 400, but I have installed headers on 351w
and 302. You may want to drop in and visit the engine forum also! The header
for the 73-79 trucks should work. you also may need to jack the motor up.
When you bought/ordered these headers did you give all info.needed like P.S.
A.T. (C6)? You also may want to try a search.
Wally Womack
Welcome to (FTE)!
I have not installed headers on a 400, but I have installed headers on 351w
and 302. You may want to drop in and visit the engine forum also! The header
for the 73-79 trucks should work. you also may need to jack the motor up.
When you bought/ordered these headers did you give all info.needed like P.S.
A.T. (C6)? You also may want to try a search.
Wally Womack
Thread Starter
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Senior User
Joined: Jan 2008
Posts: 166
Likes: 0
Yes when i bought them i did include all the info...but that truck engine bay from 68 is same as 79? also do you think if i jacked up the motor and slapped some shorties or block huggers on i could fit them?
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
blue, you could have car headers. You can not buy 400 headers for a 68 F series truck, they do not exist. They do for a 77-79 F series truck.
We don't have access to your truck or the product numbers of the item that you received. We can only give you parameters for you to work with.
John
We don't have access to your truck or the product numbers of the item that you received. We can only give you parameters for you to work with.
John
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New User
Joined: Jan 2008
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Originally Posted by OldBlue68
Yes when i bought them i did include all the info...but that truck engine bay from 68 is same as 79? also do you think if i jacked up the motor and slapped some shorties or block huggers on i could fit them?
I have a 71 4x4 that i'm putting a 351m in i bought summit's headers for like 120 and they fit perfect, i had to put the right side in from the bottom but that's it.Good Luck!
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Senior User
Joined: Jan 2008
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Likes: 0
i understand that they didnt make a style header for a 68 with 400m, i was i was asking if the headers for the year of the motor would fit in,but you answered that thank you
and thanks for the info about ur 351m with headers, we are jacking out the motor today and where gonna put those ****ers are on finnaly
thanks for all your guy's help
and thanks for the info about ur 351m with headers, we are jacking out the motor today and where gonna put those ****ers are on finnaly
thanks for all your guy's help
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