The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain > Diesel Conversions

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-08-2017, 02:42 AM   #1
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
1971 k20 badmax

I bought a 71 c20 in 2014. Loved the truck but I was always wishing I had a 4x4. It was too nice of a truck to mess with so I sold it to my stepdad with plans to get it back later on and have money for my build.

I had previously had a thread on here but I failed to keep it updated so I am going to redo it here.

I bought a pretty rough 1971 K20 with plans to do a decent frame off with a nice, reliable power plant. Ideas flew around and I ended up with a Duramax. Here's the build my friends.
Attached Images
    
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build

Last edited by Rednwhitec20; 07-08-2017 at 02:44 AM. Reason: Rename
Rednwhitec20 is offline   Reply With Quote
Old 07-08-2017, 10:01 AM   #2
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

So then came the work. A bit rusty
Attached Images
     
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-08-2017, 11:14 AM   #3
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

I fixed my frame rust and slapped some paint on her. Rebuilt the axle and put her together. Then she went to the corner for a drive line removal.
Attached Images
     
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-08-2017, 11:47 AM   #4
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

Out she came along with stock springs. I traded for a 6" skyjacker. She then went to get her first round of bodywork, which I wasn't impressed with.
Attached Images
     
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-10-2017, 01:08 AM   #5
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

Then I bought my engine, trans, and transfer case along with the brains. I cleaned and slapped a fast paint job on the engine, then I sent my harness and computers off to make it all work. Harness was simplified by Ken Wolkens, and it looks pretty good. My ECM and TCM received tuning from Pela Motorsports. And some more bodywork.
Attached Images
     
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-11-2017, 04:11 PM   #6
Dieselwrencher
6>8 Plugless........

 
Dieselwrencher's Avatar
 
Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 16,006
Re: 1971 k20 badmax

Your truck has progressed a long ways! Congrats!
__________________
Ryan
1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1972 C10 Suburban Custom Deluxe
1969 Chevy milk truck
1971 Camaro RS 5.3 BTR STG3 Cam Super T10
1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project


Tired of spark plugs? Check this out.
Dieselwrencher is online now   Reply With Quote
Old 07-11-2017, 11:10 PM   #7
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

Some more body work and then we sat the engine and tranny in. Thank you sir!
Attached Images
     
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-11-2017, 11:14 PM   #8
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

Then she was headed off to a friends shop until it drives. I bought a HP Dana 60 that still needs to be installed. I also found a nice tailgate. I then decided I needed a beefier cross member. So I had a friend make this animal.
Attached Images
     
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-11-2017, 11:21 PM   #9
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

I snagged up my favorite, Welds! Wrapped in 37's. I also got a somewhat economical vehicle. Then bought a used t-case and had it rebuilt and slapped it in. Wiring has begun, and they put in my super beefy crossmember.
Attached Images
     
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-11-2017, 11:25 PM   #10
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

And this is where I am currently in the build. I went ahead and bought a 14 bolt 11.5" one ton rear so I had more meat out back and I got discs on all 4 corners. new intake as well! Intercooling piping is on its way along with my hog of a driveshaft. I think I'm going to man up and spend some money on A/C this weekend.
Attached Images
   
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build

Last edited by Rednwhitec20; 07-11-2017 at 11:56 PM.
Rednwhitec20 is offline   Reply With Quote
Old 07-12-2017, 07:42 PM   #11
Dieselwrencher
6>8 Plugless........

 
Dieselwrencher's Avatar
 
Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 16,006
Re: 1971 k20 badmax

Very nice! You will not regret doing the AC now!
__________________
Ryan
1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1972 C10 Suburban Custom Deluxe
1969 Chevy milk truck
1971 Camaro RS 5.3 BTR STG3 Cam Super T10
1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project


Tired of spark plugs? Check this out.
Dieselwrencher is online now   Reply With Quote
Old 07-12-2017, 07:57 PM   #12
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

Quote:
Originally Posted by Dieselwrencher View Post
Very nice! You will not regret doing the AC now!
Oh I know! Now that I have a car that finally has AC, I am hooked!

Driveshaft is in the truck but I forgot to take a picture. 1480 u-joint at the case and a 1410 u-joint at the rear. Pretty beefy. The inter cooler plumbing is in as well. Steering column is about to be put in. Getting a new rag joint. Then once the AC gets wired I will have some piping for my turbskie.
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-13-2017, 02:24 PM   #13
Dieselwrencher
6>8 Plugless........

 
Dieselwrencher's Avatar
 
Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 16,006
Re: 1971 k20 badmax

Skip the rag joint and go with a Jeep XJ shaft to eliminate the rag joint IMO.
__________________
Ryan
1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1972 C10 Suburban Custom Deluxe
1969 Chevy milk truck
1971 Camaro RS 5.3 BTR STG3 Cam Super T10
1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project


Tired of spark plugs? Check this out.
Dieselwrencher is online now   Reply With Quote
Old 07-14-2017, 08:45 AM   #14
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

Quote:
Originally Posted by Dieselwrencher View Post
Skip the rag joint and go with a Jeep XJ shaft to eliminate the rag joint IMO.
Well, he's starting to get moving on it and I have no extra money.
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-14-2017, 07:28 PM   #15
v30crewcab
Registered User
 
v30crewcab's Avatar
 
Join Date: Apr 2012
Location: Chatt Tn
Posts: 823
Re: 1971 k20 badmax

you can get the xj shaft for $10-15. best mod ever
__________________
88 military v30 crewcab shortbed
5.9 cummins, nv4500, 205
http://67-72chevytrucks.com/vboard/s...d.php?t=522535
v30crewcab is offline   Reply With Quote
Old 07-14-2017, 07:40 PM   #16
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

Quote:
Originally Posted by v30crewcab View Post
you can get the xj shaft for $10-15. best mod ever
May I ask what it does?
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-14-2017, 10:15 PM   #17
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

Well I ordered my AC today through vintage air! Im pretty excited about it. Can someone buy my Dana 44 so I can get this 60 built
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-16-2017, 05:24 PM   #18
v30crewcab
Registered User
 
v30crewcab's Avatar
 
Join Date: Apr 2012
Location: Chatt Tn
Posts: 823
Re: 1971 k20 badmax

the xj shaft gives you nice ujoints on both ends, for dirt cheap. eliminates the slack of the rubber disc.
__________________
88 military v30 crewcab shortbed
5.9 cummins, nv4500, 205
http://67-72chevytrucks.com/vboard/s...d.php?t=522535
v30crewcab is offline   Reply With Quote
Old 07-16-2017, 09:36 PM   #19
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

Quote:
Originally Posted by v30crewcab View Post
the xj shaft gives you nice ujoints on both ends, for dirt cheap. eliminates the slack of the rubber disc.
Are they bolt in?
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-17-2017, 01:03 PM   #20
DieselSJ
Registered User
 
Join Date: Jun 2016
Location: Phoenix, AZ
Posts: 574
Re: 1971 k20 badmax

Quote:
Originally Posted by Rednwhitec20 View Post
Are they bolt in?
Yep.
__________________
87 R30 CC Dually, TBI 454, NV4500, zero rust barn find
87 Jeep Grand Wagoneer, 6.5 turbodiesel, 700R4
DieselSJ is offline   Reply With Quote
Old 07-17-2017, 01:41 PM   #21
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

Quote:
Originally Posted by DieselSJ View Post
Yep.
Well I have a friend with 3 totaled xj's so I'll go that route. Thank you for the help!
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-24-2017, 05:12 PM   #22
Dieselwrencher
6>8 Plugless........

 
Dieselwrencher's Avatar
 
Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 16,006
Re: 1971 k20 badmax

If he wants to sell another let me know. I need one for my 76. I stole it off and gave it to a friend. Now it is steerless.
__________________
Ryan
1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1972 C10 Suburban Custom Deluxe
1969 Chevy milk truck
1971 Camaro RS 5.3 BTR STG3 Cam Super T10
1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project


Tired of spark plugs? Check this out.
Dieselwrencher is online now   Reply With Quote
Old 07-28-2017, 08:30 PM   #23
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

Quote:
Originally Posted by Dieselwrencher View Post
If he wants to sell another let me know. I need one for my 76. I stole it off and gave it to a friend. Now it is steerless.
If I can convince him to sell me any first.

Does anyone have a cheaper was to draw fuel from a 1/2" line other than a sump?
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-30-2017, 10:24 PM   #24
Rednwhitec20
Registered User
 
Rednwhitec20's Avatar
 
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 229
Re: 1971 k20 badmax

Intercooler piping mocked up with stainless. Blue tape is where she'll be welded, but both of his Tig machines are down for now. Until Lincoln can get him a new machine it'll probably be connected by boots and clamps.
Attached Images
   
__________________
1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
Rednwhitec20 is offline   Reply With Quote
Old 07-31-2017, 03:22 PM   #25
Dieselwrencher
6>8 Plugless........

 
Dieselwrencher's Avatar
 
Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 16,006
Re: 1971 k20 badmax

I'd see if you can find some one to weld them first. How far from Pittsburgh Kansas are you? There's a board member that lives there that could probably weld these for you. What kind of tank are you using? A draw straw is a lot cheaper and can be obtained a lot of places. I use 1/2" ones in all my builds most times.
__________________
Ryan
1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1972 C10 Suburban Custom Deluxe
1969 Chevy milk truck
1971 Camaro RS 5.3 BTR STG3 Cam Super T10
1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project


Tired of spark plugs? Check this out.
Dieselwrencher is online now   Reply With Quote
Reply

Bookmarks

Tags
4x4, diesel, duramax, k20, swap

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:35 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Copyright 1997-2020 67-72chevytrucks.com