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1985 D350 440 swap headers #2907161
04/06/21 08:59 AM
04/06/21 08:59 AM
Joined: Jan 2003
Posts: 968
mopar country
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omnicrazy Offline OP
super stock
omnicrazy  Offline OP
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Joined: Jan 2003
Posts: 968
mopar country
I was wondering if anyone knew if these headers will fit on my 85 d350 with a 440.

https://www.protuninglab.com/hds-dpu79-2wd-lt.html

I like that the are stainless and the flanges don't need gaskets.

77-78-dodge-b200-300-d150-200-v8-full-length-3-od-3-bolt-16-gauge-piping-exhaust-manifold-headers-58.jpg77-78-dodge-b200-300-d150-200-v8-full-length-3-od-3-bolt-16-gauge-piping-exhaust-manifold-headers-62.jpg77-78-dodge-b200-300-d150-200-v8-full-length-3-od-3-bolt-16-gauge-piping-exhaust-manifold-headers-65.jpg77-78-dodge-b200-300-d150-200-v8-full-length-3-od-3-bolt-16-gauge-piping-exhaust-manifold-headers-68.jpg
Last edited by omnicrazy; 04/06/21 09:19 AM.
Re: 1985 D350 440 swap headers [Re: omnicrazy] #2907320
04/06/21 02:10 PM
04/06/21 02:10 PM
Joined: Dec 2006
Posts: 1,696
Byron, NY
W.I.N. racing Offline
top fuel
W.I.N. racing  Offline
top fuel

Joined: Dec 2006
Posts: 1,696
Byron, NY
I don't know specifically if those headers will fit but from my experience any BB header for 73-78 will fit all the way up to 93.


FOR SALE'02 D1500, Blown/Inj KB, Veny Heads,Bruno/CS2,Dana 60 FOR SALE
'01 Dodge 3500 S Cummins Auto, Fresh air kit, 4" Exhaust,
'05 Dodge Magnum R/T8
'60 Willys CJ5
'01 International LPX - Project, 8.3L Cummins, Allison 2000
'64 Plymouth Valiant S/P, 528 Hemi, 2spd
Re: 1985 D350 440 swap headers [Re: W.I.N. racing] #2907434
04/06/21 08:14 PM
04/06/21 08:14 PM
Joined: Jan 2003
Posts: 8,200
Candler,NC / Myrtle Beach, SC
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JDMopar Offline
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JDMopar  Offline
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Joined: Jan 2003
Posts: 8,200
Candler,NC / Myrtle Beach, SC
iagree And dang nice headers for a good price!

Re: 1985 D350 440 swap headers [Re: JDMopar] #2907516
04/06/21 11:00 PM
04/06/21 11:00 PM
Joined: May 2015
Posts: 212
n.c.
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geo. Offline
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geo.  Offline
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n.c.
OK not what you're asking about but I'll throw this out there for you to consider.
About 25 years ago I bought a set of blackjack headers for a 360 in my '85 D350.
There was an article in Mopar Action about a towing build-up that used them.
They didn't specifically list them for a D350, but I figured I'd give them a try.
If I remember correctly they interfered in two places. the main one was the top of the frame on the drivers side.
The welded crossmember also hit and some tubes had to be hammered.
I believe the frame on the 350 has a deeper C channel shape, which makes the top of the frame wider than a 150.
I eventually got them clearanced but really hated beating on my new, shiny, coated headers!
Hope you don't have this problem!

Just looked at the listing, it DOES NOT say it'll fit a 300-350 series truck, buyer beware!

Last edited by geo.; 04/06/21 11:03 PM.
Re: 1985 D350 440 swap headers [Re: geo.] #2907607
04/07/21 09:35 AM
04/07/21 09:35 AM
Joined: Jul 2007
Posts: 4,001
Wills Point, Texas
Hugh Jorgan Offline
master
Hugh Jorgan  Offline
master

Joined: Jul 2007
Posts: 4,001
Wills Point, Texas
Originally Posted by geo.

I believe the frame on the 350 has a deeper C channel shape, which makes the top of the frame wider than a 150.



I have an 84 D350 frame out back if the OP needs to measure/compare.

Re: 1985 D350 440 swap headers [Re: geo.] #2907834
04/07/21 08:47 PM
04/07/21 08:47 PM
Joined: Dec 2006
Posts: 1,696
Byron, NY
W.I.N. racing Offline
top fuel
W.I.N. racing  Offline
top fuel

Joined: Dec 2006
Posts: 1,696
Byron, NY
Originally Posted by geo.
OK not what you're asking about but I'll throw this out there for you to consider.
About 25 years ago I bought a set of blackjack headers for a 360 in my '85 D350.
There was an article in Mopar Action about a towing build-up that used them.
They didn't specifically list them for a D350, but I figured I'd give them a try.
If I remember correctly they interfered in two places. the main one was the top of the frame on the drivers side.
The welded crossmember also hit and some tubes had to be hammered.
I believe the frame on the 350 has a deeper C channel shape, which makes the top of the frame wider than a 150.
I eventually got them clearanced but really hated beating on my new, shiny, coated headers!
Hope you don't have this problem!

Just looked at the listing, it DOES NOT say it'll fit a 300-350 series truck, buyer beware!

This truck was the Last BB D 350 I had with Headers...Not Black Jack because they were the biggest POS on the market at the time but none the less when I speak its because I've done it not read about it. Truly wish a header like these were available at the time. Yes sometime you do have to massage a tube for a perfect fit...

MVC-014F (2).JPGFrame specs 2.JPG

FOR SALE'02 D1500, Blown/Inj KB, Veny Heads,Bruno/CS2,Dana 60 FOR SALE
'01 Dodge 3500 S Cummins Auto, Fresh air kit, 4" Exhaust,
'05 Dodge Magnum R/T8
'60 Willys CJ5
'01 International LPX - Project, 8.3L Cummins, Allison 2000
'64 Plymouth Valiant S/P, 528 Hemi, 2spd
Re: 1985 D350 440 swap headers [Re: W.I.N. racing] #2907946
04/08/21 10:20 AM
04/08/21 10:20 AM
Joined: May 2003
Posts: 15,331
Florida
S
scratchnfotraction Offline
I Live Here
scratchnfotraction  Offline
I Live Here
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Joined: May 2003
Posts: 15,331
Florida
IMHO< the problem is you are using a set of car headers in a truck chassis. a few members have done this in the past and posted pics and has be discussed many times.

my experience swapping in B/RB engines into 72-87 trucks is ONLY B-BODY headers required the top frame rail trimmed for clearance. and depending on the B-body header brand they can be shaped differently and require more mods to work. plus plug wire routing is a PITA. and they tend to hang lower than the frame rails which can be a problem on a lower truck or 4x4. 4x4 definitely needs room for the front drive shaft which B-body headers do not give.

a few other facts I have found with the trucks headers are 2x and 4x4 are different but there are some that will fit both.

on my 85 318/727 I had a set of hedman 79080 2x headers. fit great BUT only a low torque stock starter fit and needs removed to R&R it. BUT.. a mini starter can be R&R with out removing the header.

then when I installed the 2x NV4500 5 speed and hydro clutch from a 93 truck. I found #7 tube in the way of mounting any starter so they are a no go with a hydro clutch NV4500 bell housing. (the 833OD 4 speed hydro bell works ok)

so for the NV4500 hydro bell I needed to use a set of hedman 79170 (IIRC) 92-93 4x4 (magnum 5.2/NV4500) #7 tube differ and fit only a mini starter which was stock on a magnum 5.2 truck.

also...same deal on trimming frame rail with SB A & B-body headers in trucks.

it is the header not the frame.

79250 are the best fitting 2x or 4x4 for the $

Re: 1985 D350 440 swap headers [Re: W.I.N. racing] #2908040
04/08/21 02:33 PM
04/08/21 02:33 PM
Joined: May 2015
Posts: 212
n.c.
G
geo. Offline
enthusiast
geo.  Offline
enthusiast
G

Joined: May 2015
Posts: 212
n.c.
Originally Posted by W.I.N. racing
Originally Posted by geo.
OK not what you're asking about but I'll throw this out there for you to consider.
About 25 years ago I bought a set of blackjack headers for a 360 in my '85 D350.
There was an article in Mopar Action about a towing build-up that used them.
They didn't specifically list them for a D350, but I figured I'd give them a try.
If I remember correctly they interfered in two places. the main one was the top of the frame on the drivers side.
The welded crossmember also hit and some tubes had to be hammered.
I believe the frame on the 350 has a deeper C channel shape, which makes the top of the frame wider than a 150.
I eventually got them clearanced but really hated beating on my new, shiny, coated headers!
Hope you don't have this problem!

Just looked at the listing, it DOES NOT say it'll fit a 300-350 series truck, buyer beware!

This truck was the Last BB D 350 I had with Headers...Not Black Jack because they were the biggest POS on the market at the time but none the less when I speak its because I've done it not read about it. Truly wish a header like these were available at the time. Yes sometime you do have to massage a tube for a perfect fit...

Thanks for posting this, and what a sharp looking truck!







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