Need header help for my 351W swap [Archive] - FSB Forums

: Need header help for my 351W swap


mustangman65_79
03-31-2012, 09:01 PM
I thought for sure my 351W headers from my '89 Bronco would fit, in my '78 Bronco, but they don't.

Now I need ideas on what to do.

I prefer full length, but if I must go shorty, then I will.

OX1
04-01-2012, 10:08 AM
Not many put a small block in a 78/79.

You'd probably have to post up pics
of what is interfering for anyone
to give good feedback.

mustangman65_79
04-01-2012, 10:38 PM
Not many put a small block in a 78/79.

You'd probably have to post up pics
of what is interfering for anyone
to give good feedback.

I took the headers back out. Forgot to take pics. Then borrow a pair of shorties equal length. Drivers side fits, passenger doesn't seem to.

379sinvb
04-01-2012, 10:49 PM
I'm a little confused as to your problem. Are you trying to put the headers from your 89 351W on your 351M and they don't fit the heads or won't fit in the engine bay? I have long tubes in one of mine a matter of fact the are OX1 old headers. Please clarify.

mustangman65_79
04-01-2012, 11:35 PM
I'm a little confused as to your problem. Are you trying to put the headers from your 89 351W on your 351M and they don't fit the heads or won't fit in the engine bay? I have long tubes in one of mine a matter of fact the are OX1 old headers. Please clarify.

i did a 351W swap, and trying to find headers to fit.

K9Kodi
04-02-2012, 01:28 AM
once again, where is the fitament issue. 1) will the headers not fit the motor, or 2) will they fit the motor you just cant seem to fit them in the engine bay

OX1
04-02-2012, 06:30 AM
once again, where is the fitament issue. 1) will the headers not fit the motor, or 2) will they fit the motor you just cant seem to fit them in the engine bay

His title and first line, first post.

"Need header help for my 351W swap

I thought for sure my 351W headers from my '89 Bronco would fit, in my '78 Bronco, but they don't. "

OX1
04-02-2012, 06:35 AM
I took the headers back out. Forgot to take pics. Then borrow a pair of shorties equal length. Drivers side fits, passenger doesn't seem to.

Once again, it is hard to even start with a suggestion unless we know why they don't fit and what they are hitting. I know many shorties don't work in early broncos, so that is one place to look for something with different routing. What about 302, 2WD headers from an F150?

mustangman65_79
04-02-2012, 07:57 AM
Once again, it is hard to even start with a suggestion unless we know why they don't fit and what they are hitting. I know many shorties don't work in early broncos, so that is one place to look for something with different routing. What about 302, 2WD headers from an F150?

The drivers side this the front drive shaft, and the passenger side hit the frame and motor mount.

I have no idea about the 2wd headers, no one has any to try.

BigWheelz
04-02-2012, 09:13 AM
I thought for sure my 351W headers from my '89 Bronco would fit, in my '78 Bronco, but they don't.

Now I need ideas on what to do.

I prefer full length, but if I must go shorty, then I will.

78-79 passenger side is tight!

Sanderson makes a set for the 60's mustangs that might fit. They have some dimensions here:

http://www.sandersonheaders.com/Sanderson-FF3-Small-Block-Ford-Header-Set-for-64-68-Mustang.html

Don't order on my advice, measure and find out!

FWIW, manifolds vs headers is moot below 5000 rpm

RatBronco
04-02-2012, 09:25 AM
I haven't seen or heard of a header that will work for your app. The only thing I can think of is get a pair of shorties and pipe it or look for some fenderwell exit headers instead of chassis exit.

OX1
04-02-2012, 09:26 AM
The drivers side this the front drive shaft, and the passenger side hit the frame and motor mount.

I have no idea about the 2wd headers, no one has any to try.


Early bronco might be the way to go, look at these headers.

http://www.wildhorses4x4.com/category/bronco_headers


They had very tight frames, so headers have to hug block more, you
can see on pass side how header tubes run backwards quite
a bit before going downward (vs std 302/351W truck/stang headers).

Early broncos also had the same mechanical clutch linkage and solid front axle issues that 78/79's had.

That may be your best bet.

BigWheelz
04-02-2012, 11:09 AM
Early bronco might be the way to go, look at these headers.

http://www.wildhorses4x4.com/category/bronco_headers


They had very tight frames, so headers have to hug block more, you
can see on pass side how header tubes run backwards quite
a bit before going downward (vs std 302/351W truck/stang headers).

Early broncos also had the same mechanical clutch linkage and solid front axle issues that 78/79's had.

That may be your best bet.

X2 Wild Horses is pretty good, I bet if you call them up they can give you some dimensions.

Let us know what fits....I seriously considered a 351W E4OD swap for mine

mustangman65_79
04-03-2012, 12:04 AM
thanks guys. This has been more of a headache then first thought.

I was also looking at full headers for an '81 bronco on broncograveyard.com

#30046

those almost look like they will fit, but not sure on the drivers side driveline clearance.

broncomine
04-09-2012, 12:21 AM
if you have a 351w you have to get headers for the 351 cause 302s won,t fit

LeviD
04-09-2012, 02:18 AM
Are there such thing as high flow manifolds? If so maybe look into those if you cant find headers that fit?

danboy
04-14-2012, 09:41 PM
i have a 78 f150 i swaped a 351w out of a 96 into i have flowtec long tubes on they come really close to the front driveshaft but the do work

danboy
04-15-2012, 10:29 PM
Forgot to state that the trucks got a 3 inch body lift and i dont think they would work with out it