400M in 68F250?
Thread Starter
|
New User
Joined: Feb 2002
Posts: 5
Likes: 0
From: USA
400M in 68F250?
Hello everyone,
I'm been looking for a 390 block for my 68 F250(360) w/little luck. Everyone seems to call the 360 a 390, until I measure the stroke. I have a complete 400m sitting in my yard. It came out of a 78 LTD. My silly question is what would it take to drop the 400 in my truck. And would that be a good idea. I have a C-6 in the truck now. I don't even recall what's behind the 400. It is complete,w/ only 37,000 original miles. I cut the exhaust pipes and took the front end off and pull the entire thing about 3 years ago. I was told the motor mounts and trans mounts have to be changed. Is this a worthy task to tackle and what would I need. Any welding? Should I just continue the search.
Thankx for the help.
LDH
I'm been looking for a 390 block for my 68 F250(360) w/little luck. Everyone seems to call the 360 a 390, until I measure the stroke. I have a complete 400m sitting in my yard. It came out of a 78 LTD. My silly question is what would it take to drop the 400 in my truck. And would that be a good idea. I have a C-6 in the truck now. I don't even recall what's behind the 400. It is complete,w/ only 37,000 original miles. I cut the exhaust pipes and took the front end off and pull the entire thing about 3 years ago. I was told the motor mounts and trans mounts have to be changed. Is this a worthy task to tackle and what would I need. Any welding? Should I just continue the search.
Thankx for the help.
LDH
New User
Joined: Feb 2002
Posts: 4
Likes: 0
From: austin usa
400M in 68F250?
to the question of fitting a 400m in an older truck, yes it is a very nice fit. an aquaintance of mine installed a 400 in a 1970 1/2 ton with no alterations. i test fitted a 400 in a 65 3/4 and only one hole need to be drilled to bolt the engine towers in place. i hope this helped.
Posting Guru
Joined: Aug 2000
Posts: 2,416
Likes: 4
From: PacNW
400M in 68F250?
>Hello everyone,
>
>I'm been looking for a 390 block for my 68 F250(360)
>w/little luck. Everyone seems to call the 360 a 390, until I
>measure the stroke. I have a complete 400m sitting in my
>yard. It came out of a 78 LTD. My silly question is what
>would it take to drop the 400 in my truck. And would that be
>a good idea. I have a C-6 in the truck now. I don't even
>recall what's behind the 400. It is complete,w/ only 37,000
>original miles. I cut the exhaust pipes and took the front
>end off and pull the entire thing about 3 years ago. I was
>told the motor mounts and trans mounts have to be changed.
>Is this a worthy task to tackle and what would I need. Any
>welding? Should I just continue the search.
I'm not an FE guy but I'm pretty sure that the 360 and 390 share the same block. I believe all that needs to be done is swap the rotating assembly (crank, rods & pistons) and a 360 becomes a 390. You might want to check in on the FE series forum to verify that.
As far as the 400 going into the truck you will definitely need to swap the tranny. FE C6s don't have the same bolt pattern as the 351M/400/429/460 C6s.
>
>I'm been looking for a 390 block for my 68 F250(360)
>w/little luck. Everyone seems to call the 360 a 390, until I
>measure the stroke. I have a complete 400m sitting in my
>yard. It came out of a 78 LTD. My silly question is what
>would it take to drop the 400 in my truck. And would that be
>a good idea. I have a C-6 in the truck now. I don't even
>recall what's behind the 400. It is complete,w/ only 37,000
>original miles. I cut the exhaust pipes and took the front
>end off and pull the entire thing about 3 years ago. I was
>told the motor mounts and trans mounts have to be changed.
>Is this a worthy task to tackle and what would I need. Any
>welding? Should I just continue the search.
I'm not an FE guy but I'm pretty sure that the 360 and 390 share the same block. I believe all that needs to be done is swap the rotating assembly (crank, rods & pistons) and a 360 becomes a 390. You might want to check in on the FE series forum to verify that.
As far as the 400 going into the truck you will definitely need to swap the tranny. FE C6s don't have the same bolt pattern as the 351M/400/429/460 C6s.
