Friend is putting in a Cummins Turbo Diesel - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Yukon Jack** · 04-14-2004, 11:38 AM

Here are some pics of a turbo Cummins Diesel a friend of mine is putting in his 3/4 ton 4x4. This is a work truck that will have a flatbed on it. He is going to lengthen the frame which will assist in his rear driveshaft issues. The NP205 is a divorced unit out of a Dodge truck. He is definitely going to have to do a body lift to assist with clearance. Going to be a very tight engine compartment to say the least.

**'70_402** · 04-14-2004, 11:49 AM

Is this a 3/4 ton 4x4 chevy?? or dodge?

griesel72 · 04-14-2004, 11:49 AM

Mark, you guys do all kinds of cool stuff down there. I'm really interested in how a guy would do that kind of swap. Are there computer issues involved? Is it going to be the body on the truck behind that frame.

stelth2002 · 04-14-2004, 11:54 AM

Thats an earlier cummins and an auto

(. BUT sounds very interesting. I would like to do that to a jeep someday. Was the drivetrain orginally a 2wd since he has the divorced t/c??

**Yukon Jack** · 04-14-2004, 11:57 AM

Yes it will be the body you can see behind the truck. I can't recall but I think it is a 71 or 72 Chevy 3/4 ton 4x4 dually. The rear end is from a newer dually so it is a 14 bolt. Front axle is the original Dana 44. He is an incredible fabricator, I was drooling all over his crossmembers he has built and his motor mounts. That is a skill I wish I had. Not sure about the computer issues he is going to have to tackle. The motor and tranny did come from a later model Dodge.

This guy's brother is my buddy who has the 1970 1 ton that he converted to 4wd. I guess skill runs in their family.

**Yukon Jack** · 04-14-2004, 11:58 AM

I'm not sure if the Dodge that he got the engine and tranny from was originally a 4x4. I'm not exactly sure why he is going divorced. Is that auto tranny a good model? For some reason I was thinking he said it was a manual, but I know nothing about Dodge stuff.

**Classic Heartbeat** · 04-14-2004, 05:06 PM

Is he going to reinforce the frame? I hear that the cummins deisel is a tourquy motor and was cracking frames on the earlier models. These frames may not be able to withstand the torque without reinforcement. WES www.ClassicHeartbeat.com

*67Fleetsidedream* · 04-14-2004, 05:16 PM

I agree with Wes 100% Even reinforced it may produce way too much torque for the frame.

**Yukon Jack** · 04-14-2004, 05:17 PM

It wouldn't surprise me if he does plan on reinforcing the frame, but I will mention that to him to make sure he has given some thought to that.

stelth2002 · 04-14-2004, 05:26 PM

my friends cummins is putting a good 800 + ft lbs of torque out. Pulls like no other. So i agree

roger0080 · 04-16-2004, 08:35 PM

If frame re-enforcement is needed, and with all the fabricating, would it be easier just to use the existing Dodge 3/4 or 1T frame, motor, running gear and just put the good old chevy body on it????

Tx Firefighter · 04-16-2004, 08:40 PM

The Dodge 4x4 will have a coil spring front suspension. It's not very well liked by most hard core Dodge guys.

Faster_than_you · 04-16-2004, 09:06 PM

hahaha, WOW to say the least. that is a thought I really dont think anyone I have heard of fathoming. he does seem to have quite the touch with the fabrication process. You kuntry boys are sure crazy. 800 torque would crack the frame? well then before I start adding in my turbo setup on my 454 I guess i should think a little bit of the frame, duhrrr.

lukecp · 04-16-2004, 09:51 PM

Looks like a sweet setup.....i'm defenitly a fan of the Cummins diesel, i drove one a few years ago in a '01 3/4 ton 4x4 and i loved it. Gobs of toruqe!
I think it would be a cool swap into one of these trucks....makes sure to post more pics.

Tx Firefighter · 04-16-2004, 11:38 PM

Both mine and my wife's daily drivers are Dodge Cummins short bed trucks. Stock is 555 lb/ft of torque at 1600 rpm. That may not sound like much, but the low rpm of the torque peak is the key. It's real easy to turn a Cummins up to 750+ lb/ft and still drive it every day reliably.

Mine...

Tx Firefighter · 04-16-2004, 11:42 PM

Hers, it's the baby hauler...

*60apache4* · 04-16-2004, 11:48 PM

Someone posted this one a couple days ago.

http://67-72chevytrucks.com/vboard/s...hlight=allison

Might give them a call to find out the details.

**Yukon Jack** · 04-17-2004, 09:52 AM

Tim left me a message saying the tranny is a six speed from a bus. I will call him and get more details. It is my memory that the truck he got the engine from was in a very bad accident and the frame is toast.

FRENCHBLUE72 · 04-17-2004, 11:00 AM

I have alway's loved the sound of a good diesel but damn that thing is gonna surprise a few people when it blow's there door's off with a trailer in tow!!!!!

*60apache4* · 04-17-2004, 02:26 PM

Here's the truck that I mentioned. It's a 1970 CHEVROLET C3500, 4x4 6v53 Detroit Diesel 6 speed Allison transmission 1-ton front & rear axels 1 ton suspension Dodge np205 transfer case.

stelth2002 · 04-17-2004, 04:15 PM

the engine is so tall thats one reason that thing is jacked up so tall. Hey firefighter... how you like the 04 cummins?

charlieo · 04-18-2004, 10:58 AM

I always thought it would be cool to put the 4 cyl cummins (4BT) in a 67-72 chevy truck , then add a Banks system to it . Better fuel economy and still lots a torque !!

Figment412 · 04-18-2004, 11:55 AM

I have been thinking hard about putting in a v-6 International, or possibly the v-8

veedublu · 04-18-2004, 11:48 PM

Just wanted to clear up a few misconceptions in this thread:

That engine (or injection pump at least) is from a '93 or older Dodge (if it's from a Dodge). No real computer issues... maybe for the voltage regulator, and TPS for autos with overdrives, depending on the year.

That transmission (and thick bellhousing adapter) did not come out of a Dodge truck - don't know anything about it :p

Not all Dodge 4x4's had coil springs up front... 1993 and older had leaf spring Dana 60's

On my project (STILL waiting to get the cab back from the paint shop) I used the Dodge frame as I knew it would handle the stress from the mighty Cummins. It should be "done" within a month, and will look a lot like Yukon Jack's truck, except Hugger Orange with dual exhaust stacks blowin' black smoke

John

J_T · 03-26-2007, 09:29 AM

Has there been any updates to this? I have a 1996 12V cummins with 5speed that one day I would like to make it a donor truck for a 69-72 blazer! and I am trying to get information on if the firewall was modified. and the complexity of the project! So if anyone has any updates on this project or any other cummins in a 69-72 Chevy/GMC I would appreciate it.

For me having the manual and transfer case direct out of a dodge it may be easier to just use the entire running gear and I'll weigh my option on the axles (depending on what my goals are with the next truck!)

I think I read that some sugested using the frame from the cummins donor truck and placing the project body on it. but for me I have a a long wheel base extended cab pickup the cummins is in now...and the blazer is significantly shorter! (I guess the new frame could be modified and shortened...? Who knows! I am just getting started in my thoughts and it won't be in the near future b/c I have some good years left on my dodge right now!

Any help is appreciated!

04-14-2004, 11:38 AM	#1
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	Friend is putting in a Cummins Turbo Diesel Here are some pics of a turbo Cummins Diesel a friend of mine is putting in his 3/4 ton 4x4. This is a work truck that will have a flatbed on it. He is going to lengthen the frame which will assist in his rear driveshaft issues. The NP205 is a divorced unit out of a Dodge truck. He is definitely going to have to do a body lift to assist with clearance. Going to be a very tight engine compartment to say the least. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14 Last edited by Yukon Jack; 02-20-2007 at 10:11 AM.

04-14-2004, 11:49 AM	#2
'70_402 Senior Member Join Date: Dec 2003 Location: Pampa, Texas Posts: 1,554	Is this a 3/4 ton 4x4 chevy?? or dodge? __________________ https://www.ebay.com/itm/29620574751...mis&media=COPY

04-14-2004, 11:49 AM	#3
griesel72 Senior Member Join Date: Apr 2003 Location: Howard, Kansas USA Posts: 1,997	Mark, you guys do all kinds of cool stuff down there. I'm really interested in how a guy would do that kind of swap. Are there computer issues involved? Is it going to be the body on the truck behind that frame. __________________ 1969 K10 Custom 10 1997 Z71 2006 Volkswagen Jetta TDI 2006 King Ranch 1980 Wife

04-14-2004, 11:54 AM	#4
stelth2002 Young Gun wth Fast Inline Join Date: Jan 2002 Location: Idaho Posts: 1,475	Thats an earlier cummins and an auto (. BUT sounds very interesting. I would like to do that to a jeep someday. Was the drivetrain orginally a 2wd since he has the divorced t/c?? __________________ 1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!!

04-14-2004, 11:57 AM	#5
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	Yes it will be the body you can see behind the truck. I can't recall but I think it is a 71 or 72 Chevy 3/4 ton 4x4 dually. The rear end is from a newer dually so it is a 14 bolt. Front axle is the original Dana 44. He is an incredible fabricator, I was drooling all over his crossmembers he has built and his motor mounts. That is a skill I wish I had. Not sure about the computer issues he is going to have to tackle. The motor and tranny did come from a later model Dodge. This guy's brother is my buddy who has the 1970 1 ton that he converted to 4wd. I guess skill runs in their family. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

04-14-2004, 11:58 AM	#6
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	I'm not sure if the Dodge that he got the engine and tranny from was originally a 4x4. I'm not exactly sure why he is going divorced. Is that auto tranny a good model? For some reason I was thinking he said it was a manual, but I know nothing about Dodge stuff. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

04-14-2004, 05:06 PM	#7
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,768	Is he going to reinforce the frame? I hear that the cummins deisel is a tourquy motor and was cracking frames on the earlier models. These frames may not be able to withstand the torque without reinforcement. WES www.ClassicHeartbeat.com __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys

04-14-2004, 05:16 PM	#8
67Fleetsidedream Wiseass secured himself a BAN Join Date: Nov 2000 Location: MOON!!! Posts: 2,282	I agree with Wes 100% Even reinforced it may produce way too much torque for the frame.

04-14-2004, 05:17 PM	#9
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	It wouldn't surprise me if he does plan on reinforcing the frame, but I will mention that to him to make sure he has given some thought to that. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

04-14-2004, 05:26 PM	#10
stelth2002 Young Gun wth Fast Inline Join Date: Jan 2002 Location: Idaho Posts: 1,475	my friends cummins is putting a good 800 + ft lbs of torque out. Pulls like no other. So i agree __________________ 1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!!

04-16-2004, 08:35 PM	#11
roger0080 Registered User Join Date: Nov 2000 Location: Carver County, Minnesota, USA Posts: 626	If frame re-enforcement is needed, and with all the fabricating, would it be easier just to use the existing Dodge 3/4 or 1T frame, motor, running gear and just put the good old chevy body on it???? __________________ 72 Chev C-10 90% restored (former AZ truck) ... 71 Chev K-20 Cheyenne my vacation crusier... 72 Chev C-10 Now retired and striped after many faithful miles... 72 GMC 1500 Retired to the junk yard after bought new in '71...

04-16-2004, 08:40 PM	#12
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	The Dodge 4x4 will have a coil spring front suspension. It's not very well liked by most hard core Dodge guys. __________________ I'm on the Instagram- @Gearhead_Kevin

04-16-2004, 09:06 PM	#13
Faster_than_you Registered User Join Date: Mar 2004 Location: Virginia beach, Va Posts: 209	only 800 torque hahaha, WOW to say the least. that is a thought I really dont think anyone I have heard of fathoming. he does seem to have quite the touch with the fabrication process. You kuntry boys are sure crazy. 800 torque would crack the frame? well then before I start adding in my turbo setup on my 454 I guess i should think a little bit of the frame, duhrrr. __________________ ~Christopher L. Orr 71 c20, 454- Stolen While Deployed. dynoed at 550 ft lbs, 425 hp at 3000 rpm (mustang dyno). TH400 3500 stall.... etc, etc.

04-16-2004, 09:51 PM	#14
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	Looks like a sweet setup.....i'm defenitly a fan of the Cummins diesel, i drove one a few years ago in a '01 3/4 ton 4x4 and i loved it. Gobs of toruqe! I think it would be a cool swap into one of these trucks....makes sure to post more pics. __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

04-16-2004, 11:38 PM	#15
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Both mine and my wife's daily drivers are Dodge Cummins short bed trucks. Stock is 555 lb/ft of torque at 1600 rpm. That may not sound like much, but the low rpm of the torque peak is the key. It's real easy to turn a Cummins up to 750+ lb/ft and still drive it every day reliably. Mine... __________________ I'm on the Instagram- @Gearhead_Kevin



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04-16-2004, 11:42 PM	#16
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Hers, it's the baby hauler... __________________ I'm on the Instagram- @Gearhead_Kevin

04-16-2004, 11:48 PM	#17
60apache4 Account Suspended Join Date: Nov 2001 Location: Oregon Posts: 147	Someone posted this one a couple days ago. http://67-72chevytrucks.com/vboard/s...hlight=allison Might give them a call to find out the details.

04-17-2004, 09:52 AM	#18
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	Tim left me a message saying the tranny is a six speed from a bus. I will call him and get more details. It is my memory that the truck he got the engine from was in a very bad accident and the frame is toast. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

04-17-2004, 11:00 AM	#19
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,608	I have alway's loved the sound of a good diesel but damn that thing is gonna surprise a few people when it blow's there door's off with a trailer in tow!!!!! __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

04-17-2004, 02:26 PM	#20
60apache4 Account Suspended Join Date: Nov 2001 Location: Oregon Posts: 147	Here's the truck that I mentioned. It's a 1970 CHEVROLET C3500, 4x4 6v53 Detroit Diesel 6 speed Allison transmission 1-ton front & rear axels 1 ton suspension Dodge np205 transfer case.

04-17-2004, 04:15 PM	#21
stelth2002 Young Gun wth Fast Inline Join Date: Jan 2002 Location: Idaho Posts: 1,475	the engine is so tall thats one reason that thing is jacked up so tall. Hey firefighter... how you like the 04 cummins? __________________ 1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!!

04-18-2004, 10:58 AM	#22
charlieo Registered User Join Date: Feb 2003 Location: sw Posts: 341	I always thought it would be cool to put the 4 cyl cummins (4BT) in a 67-72 chevy truck , then add a Banks system to it . Better fuel economy and still lots a torque !!

04-18-2004, 11:55 AM	#23
Figment412 Registered User Join Date: Dec 2002 Location: Fort Wayne, IN Posts: 108	I have been thinking hard about putting in a v-6 International, or possibly the v-8 __________________ Save your money and do it right the first time. 1968 GMC short bed 1972 Cab 74 SB Chevy running gear

04-18-2004, 11:48 PM	#24
veedublu Registered User Join Date: Jul 2001 Location: Colorado Springs Posts: 159	Just wanted to clear up a few misconceptions in this thread: That engine (or injection pump at least) is from a '93 or older Dodge (if it's from a Dodge). No real computer issues... maybe for the voltage regulator, and TPS for autos with overdrives, depending on the year. That transmission (and thick bellhousing adapter) did not come out of a Dodge truck - don't know anything about it :p Not all Dodge 4x4's had coil springs up front... 1993 and older had leaf spring Dana 60's On my project (STILL waiting to get the cab back from the paint shop) I used the Dodge frame as I knew it would handle the stress from the mighty Cummins. It should be "done" within a month, and will look a lot like Yukon Jack's truck, except Hugger Orange with dual exhaust stacks blowin' black smoke John __________________ 1976 K20 my dad bought new - longbed stepside, just turned 50k miles

03-26-2007, 09:29 AM	#25
J_T Registered User Join Date: Mar 2007 Location: TN Posts: 24	Re: Friend is putting in a Cummins Turbo Diesel Has there been any updates to this? I have a 1996 12V cummins with 5speed that one day I would like to make it a donor truck for a 69-72 blazer! and I am trying to get information on if the firewall was modified. and the complexity of the project! So if anyone has any updates on this project or any other cummins in a 69-72 Chevy/GMC I would appreciate it. For me having the manual and transfer case direct out of a dodge it may be easier to just use the entire running gear and I'll weigh my option on the axles (depending on what my goals are with the next truck!) I think I read that some sugested using the frame from the cummins donor truck and placing the project body on it. but for me I have a a long wheel base extended cab pickup the cummins is in now...and the blazer is significantly shorter! (I guess the new frame could be modified and shortened...? Who knows! I am just getting started in my thoughts and it won't be in the near future b/c I have some good years left on my dodge right now! Any help is appreciated!

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