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  #1  
Old 06-01-2009, 05:12 PM
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zmjeeps zmjeeps is offline
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Project Humpty '74 J20 Diesel Build UPDATED!

Hello all,
I've been busy working on this project for months now and I finally remember to talk to the owner about putting a post here on the forum detailing this build. I'll give a specs list, then link to a bunch of pictures. Please feel free to ask any questions.

Truck: 1974 Jeep J20. 40K original miles, barn find in Ohio.
Sheetmetal: NOS cab, fenders, valance, radiator support, doors. '67 Bed
Engine: Cummins 4BTA from a bread truck. Turbo charged, intercooled, 3.9L 4 cyl. 130HP stock.
Trans/Xfer: NV4500/Np205 from '90 Dodge 6bt truck. Same truck gave up its accessories for the engine
Axles: Stock J-20
Springs: Custom Alcan Springs 8 leaf front, 7 leaf rears (Replace the 3 leaf front, 2 leaf rear original springs)
Bilstien Shocks
Dual Battery Tray
Aftermarket Heat and A/C mounted in the cab behind the dash
Extensive Dynamat in the cab
Hydraboost brakes Discs front, Drums Rear. SS fuel and brake lines

Link to the pics: http://photobucket.com/humpty
Organized the pics a little better with better links:
All the Sound Proofing Pics: http://s689.photobucket.com/albums/v...umpty/Dynamat/
Progress Pics by month in subfolders.
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Last edited by zmjeeps : 02-01-2010 at 05:01 PM. Reason: Change Title
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  #2  
Old 06-01-2009, 05:32 PM
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Neat
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  #3  
Old 06-01-2009, 06:21 PM
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Fiodh. Argus Fiodh. Argus is offline
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The photos didn't show up for me but it might have been my computer. Must be nice to have a diesel build all done and running, would be great to have. Diesel is actually cheaper than gas again here.

I look forward to seeing more.
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Last edited by Fiodh. Argus : 06-01-2009 at 06:24 PM.
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  #4  
Old 06-01-2009, 06:28 PM
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TexTJ209 TexTJ209 is offline
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Those inner fenders were a little rough.


Looks like a cool build...I was thinking about building a battery tray for mine eventually right where you put that one. Thanks for the pic ideas.
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  #5  
Old 06-02-2009, 07:16 AM
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zmjeeps zmjeeps is offline
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Quote:
Originally Posted by TexTJ209
Those inner fenders were a little rough.


Looks like a cool build...I was thinking about building a battery tray for mine eventually right where you put that one. Thanks for the pic ideas.

Yes they were, and so was the underside of the bed, but the inside was great because of the cab. Original owner only drove it in the winter and then parked it in the barn, so it got eaten from the inside out. No worries, have NOS inner fenders to replace them.

Anyone else having trouble seeing the pics?

Zack
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  #6  
Old 06-02-2009, 07:26 AM
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Hello all. New around these parts but just wanted to say nice truck! Awesome build! I'm getting ready to convert my '89 Blazer from the 5.7 to the 6.2 diesel myself
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  #7  
Old 06-02-2009, 07:26 AM
jeepdreamer jeepdreamer is offline
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pic problems

Hey Zack,
I had a lil trouble seeing the picts... kinda looked like thumbnails that wont get bigger??
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  #8  
Old 06-01-2009, 07:04 PM
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Quote:
Originally Posted by Fiodh. Argus
The photos didn't show up for me but it might have been my computer. Must be nice to have a diesel build all done and running, would be great to have. Diesel is actually cheaper than gas again here.

I look forward to seeing more.

Try this:

http://s689.photobucket.com/albums/v...mjeeps/Humpty/
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  #9  
Old 06-01-2009, 06:27 PM
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I have watched and assisted (just a little) with this project and this truck is really cool! The oil burner along with the HV4500 and NP205 is a great drivetrain. Were Zack find some of these NOS parts still amazes me! he cab still had tags and stickers from the factory!
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  #10  
Old 06-01-2009, 07:05 PM
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Very nice!


[Nitpick mode]

Quote:
Originally Posted by zmjeeps
Engine: Cummings 4BTA from a bread truck.

[/Nitpick mode]
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  #11  
Old 06-01-2009, 07:10 PM
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Very cool!
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  #12  
Old 07-01-2010, 04:27 AM
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Pic's

Hi i have the same plan for mine but vith the BT6, did get a 96 BT6 with tranny, and al components for some weeks agoo and are now ready to start but collecting info and tips regarding do and donts.

Will put it in a unike J20, one of 12 original built Crewcab's by Jeep, think i put a picture in my profile ).

What was the most dificult part of the swap ?

Is it upp an running now or is it still a project ?

Beutifull project and look forward to get some moore info

Best Regards
Mikael Eriksson
Sweden
J20 -76 Crewcab Original ( fore the moment inline 6 but will be Cummins BT6 )

J20 -77 Pioneer Orginal 401
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  #13  
Old 07-01-2010, 05:21 AM
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This thread really really sucks.

I was almost 99% sure that I was going to keep a gasser in my Honcho, but now you have me second guessing myself again. Now I will, again, spend weeks agonizing over the decision that I thought was already made. My Cummins is sitting right behind the Honcho.

Absolutely beautiful truck.
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  #14  
Old 07-01-2010, 11:19 AM
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Quote:
Originally Posted by DAHoyle
This thread really really sucks.

I was almost 99% sure that I was going to keep a gasser in my Honcho, but now you have me second guessing myself again. Now I will, again, spend weeks agonizing over the decision that I thought was already made. My Cummins is sitting right behind the Honcho.

Absolutely beautiful truck.


... I went through this same process several times. The first time I upgraded axles. The next coupla times were full on builds that I had researched.

Its all a process and part of the sickness!
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Post #14 ~ http://www.ifsja.org/forums/vb/showt...=1#post1580206
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  #15  
Old 07-01-2010, 03:27 PM
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76FSChief 76FSChief is offline
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Very nice work. Love to see another Jeep with a Cummins in it. I am in the middle of my 6bt swap and have a photobucket account set up for those that want more pictures - wont be the same quality of work as you see in this thread, but it will work.

I would love to know which Hydroboost system you used for your Jeep, and is that a Vintage Air heating system??

Once again FANTASTIC work!!

Last edited by 76FSChief : 07-01-2010 at 03:35 PM.
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  #16  
Old 07-05-2010, 06:07 PM
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Quote:
Originally Posted by 76FSChief
Very nice work. Love to see another Jeep with a Cummins in it. I am in the middle of my 6bt swap and have a photobucket account set up for those that want more pictures - wont be the same quality of work as you see in this thread, but it will work.

I would love to know which Hydroboost system you used for your Jeep, and is that a Vintage Air heating system??

Once again FANTASTIC work!!


There are some of us "want to convert to deisel" guys who'd like to see your build as you progress along with pics
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Quote:
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Post #14 ~ http://www.ifsja.org/forums/vb/showt...=1#post1580206
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  #17  
Old 07-01-2010, 11:16 AM
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Quote:
Originally Posted by swedjeep
Hi i have the same plan for mine but vith the BT6, did get a 96 BT6 with tranny, and al components for some weeks agoo and are now ready to start but collecting info and tips regarding do and donts.

I'd like to see how you pull yours off. I keep hearing you can get a 6BT in an FSJ but that the firewall needs modification and the aftercooler mounting gets interesting. PLEASE post pics!

Quote:
Originally Posted by swedjeep
Will put it in a unike J20, one of 12 original built Crewcab's by Jeep, think i put a picture in my profile ).

"unike" Also ... I was under the impression that Jeep never made a 4 door/crew cab truck. I checked out your profile here on IFSJA and didnt see any pics. Would you post 'em up here?
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  #18  
Old 07-02-2010, 03:54 AM
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Quote:
Originally Posted by Tigger4X
I'd like to see how you pull yours off. I keep hearing you can get a 6BT in an FSJ but that the firewall needs modification and the aftercooler mounting gets interesting. PLEASE post pics!



"unike" Also ... I was under the impression that Jeep never made a 4 door/crew cab truck. I checked out your profile here on IFSJA and didnt see any pics. Would you post 'em up here?

Sent ya a PM with pics, more info later // Regards Mike
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