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 > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 10-30-2006, 05:34 PM   #1
Flatty
Registered User
 
Join Date: Apr 2006
Location: Redwood City, CA
Posts: 27
Swapping a Cummins into a 67-72 chevy

Has anyone done this? I want to swap a cumming diesel into a 67-72 chevy truck. I ahve anlways loved the look of the chevy's, but I LOVE the cummins motor for a tow rig. I tow my roockcralwer all over ht place to wheel, but now without a tow rig, I have to drive the wheeler... This is not an option for now. Has anyone ever done this swap? Are there any recommendations?

Dima
Flatty is offline   Reply With Quote
Old 10-30-2006, 07:45 PM   #2
72freak
Rottenwood Garage Member
 
72freak's Avatar
 
Join Date: May 2005
Location: Marietta, Georgia
Posts: 4,321
Re: Swapping a Cummins into a 67-72 chevy

Its not the most popular diesel swap, nor the easiest...but in my eyes the only one woth doing!!!!!!!!!! There are many folks that have done it...there is even someone on here that did a 67-72 on the Dodge frame to make it easier.
If you try to use the 67-72 frame you will need to beef it up.
72freak is offline   Reply With Quote
Old 10-30-2006, 08:08 PM   #3
Flatty
Registered User
 
Join Date: Apr 2006
Location: Redwood City, CA
Posts: 27
Re: Swapping a Cummins into a 67-72 chevy

Quote:
Originally Posted by 72freak View Post
Its not the most popular diesel swap, nor the easiest...but in my eyes the only one woth doing!!!!!!!!!! There are many folks that have done it...there is even someone on here that did a 67-72 on the Dodge frame to make it easier.
If you try to use the 67-72 frame you will need to beef it up.
How would I go about beefing up the frame? Do I have to channel it?

Dima
Flatty is offline   Reply With Quote
Old 10-30-2006, 09:10 PM   #4
qksilver
Senior Member
 
Join Date: Dec 2004
Location: Southern Pines NC
Posts: 3,853
Re: Swapping a Cummins into a 67-72 chevy

box it. channelling is when you drop the body down over the frame
and probably some X bracing to the crossmembers
qksilver is offline   Reply With Quote
Old 10-30-2006, 09:40 PM   #5
TP from Cntl PA
Registered User
 
TP from Cntl PA's Avatar
 
Join Date: Apr 2003
Location: Central PA....In the Berg of Nisbet
Posts: 790
Re: Swapping a Cummins into a 67-72 chevy

Frame work depends on what engine you use...............Mine is still stock, so is the front end. I'll probably have to bag it though when I get around to repainting/cab off resto...........It squats some in the front end.

I did one, and honestly it wasn't as much work as I had planned, but it isn't completed yet(needs painted and sheet metal replaced), and I hadn't anticipated how underbuilt GM driveline components were. I am running GM from the flywheel back, and honestly, nothing has held up. Acouple trannys, driveshafts, a good # of carrier bearings, and lets not forget u-joints. I am going to a ZF-6spd eventually too, mainly just to get a HD one for a tranny oil cooler. I also am going to to a heavier driveshaft/u-joints and I am going to adapt a heavier carrier too.

In the mean time though, I've been patching it up when it breaks and have been running it. IMO, for a knock 'em down and drag 'em out truck engine, you can't beat a Cummins..........Torque out the rear at 1800 rpm!

For my next one, I am going to use a 4-53 or 4-71 Screamin' Detroit.........Not to much low end with them, but I want them for the fact you can take a Jake Brake off a larger 6-71 and pop it right on the 4 and have a AWESOME tow rig in both pull power and STOPPING power.

I also always thought a 354 Perkins would be a good engine..........Gas engine go with the diesel low end...........
__________________
'72 K-20 EFI'ed 250 Inline/4spd stake body, Farm Truck
'71 C-20 Cummins Diesel Powered, In storage thanks to $5.00 diesel!
'69 3500 GMC 305V-6/4spd, Still under reconstruction..........

Inlines Rule! 6 soldiers standing is better than 8 laying down!!!!!!!!
TP from Cntl PA is offline   Reply With Quote
Old 10-31-2006, 08:06 PM   #6
alblogg
Registered User
 
alblogg's Avatar
 
Join Date: Oct 2006
Location: NC
Posts: 62
Re: Swapping a Cummins into a 67-72 chevy

Quote:
Originally Posted by TP from Cntl PA View Post
Frame work depends on what engine you use...............Mine is still stock, so is the front end. I'll probably have to bag it though when I get around to repainting/cab off resto...........It squats some in the front end.

I did one, and honestly it wasn't as much work as I had planned, but it isn't completed yet(needs painted and sheet metal replaced), and I hadn't anticipated how underbuilt GM driveline components were. I am running GM from the flywheel back, and honestly, nothing has held up. Acouple trannys, driveshafts, a good # of carrier bearings, and lets not forget u-joints. I am going to a ZF-6spd eventually too, mainly just to get a HD one for a tranny oil cooler. I also am going to to a heavier driveshaft/u-joints and I am going to adapt a heavier carrier too.

In the mean time though, I've been patching it up when it breaks and have been running it. IMO, for a knock 'em down and drag 'em out truck engine, you can't beat a Cummins..........Torque out the rear at 1800 rpm!

For my next one, I am going to use a 4-53 or 4-71 Screamin' Detroit.........Not to much low end with them, but I want them for the fact you can take a Jake Brake off a larger 6-71 and pop it right on the 4 and have a AWESOME tow rig in both pull power and STOPPING power.

I also always thought a 354 Perkins would be a good engine..........Gas engine go with the diesel low end...........
I had two Dodges both with Cummins in them best engines I have seen and owned the trucks was not that nice but served their purpose. I thought about switching the engine into a Chevy but that was the things I thought about was having to build up the frame and the rear end staying in it. That was what I came up with if I was going to do it was to use the Dodge frame and put a Chevy body on it.
__________________
'07 G6 Wife's car
'00 Malibu stock, just a parts getter.
'99 Blazer LT Loaded, K&N Filter, Pioneer Super
Tuner,Viper
'88 K1500 Cheyenne, 5.0, stock, bought new
'86 Nissan 720 Trash Truck
'69 C/10 step side, 307, all original, second owner, in process of restore.



The person who says it cannot be done should not interrurt the person doing it.
Share your knowledge. It is a way to achieve immortality.


Allen- Paintman
Wrenchtwister
Broompusher
alblogg is offline   Reply With Quote
Old 10-31-2006, 11:35 PM   #7
Pl4yboy
Freeeeee Mason...
 
Pl4yboy's Avatar
 
Join Date: Sep 2006
Location: McAlester, Oklahoma
Posts: 320
Re: Swapping a Cummins into a 67-72 chevy

For once I can say... The engine will probably outlast the truck. My family has owned 4 Cummins in the past 9 years and one of them had 500,000 miles on it. Of course he went through about 5-6 clutches and 3 trannies... But the motor held strong the entire time. Slap some cold air and and crank up the fuel and its an even bigger beast.
Pl4yboy is offline   Reply With Quote
Old 11-01-2006, 08:16 AM   #8
TP from Cntl PA
Registered User
 
TP from Cntl PA's Avatar
 
Join Date: Apr 2003
Location: Central PA....In the Berg of Nisbet
Posts: 790
Re: Swapping a Cummins into a 67-72 chevy

Quote:
Originally Posted by Pl4yboy View Post
For once I can say... The engine will probably outlast the truck. My family has owned 4 Cummins in the past 9 years and one of them had 500,000 miles on it. Of course he went through about 5-6 clutches and 3 trannies... But the motor held strong the entire time. Slap some cold air and and crank up the fuel and its an even bigger beast.
500K is just getting broke in for one of them. I was looking at buying a 5.9 with over 300K on it and some of the guys I was working with thought I was nuts in the machine shop...............They didn't quite understand diesels. Place I wrench at part time runs 3406 Cats and later C-15's out to well over 1 million miles.
__________________
'72 K-20 EFI'ed 250 Inline/4spd stake body, Farm Truck
'71 C-20 Cummins Diesel Powered, In storage thanks to $5.00 diesel!
'69 3500 GMC 305V-6/4spd, Still under reconstruction..........

Inlines Rule! 6 soldiers standing is better than 8 laying down!!!!!!!!
TP from Cntl PA is offline   Reply With Quote
Old 11-01-2006, 05:25 PM   #9
onetonk5
Cereal Killer
 
onetonk5's Avatar
 
Join Date: Jan 2006
Location: Montgomery, Alabama
Posts: 639
Re: Swapping a Cummins into a 67-72 chevy

go back to pirate you vodka smuggling whore
onetonk5 is offline   Reply With Quote
Old 11-01-2006, 05:27 PM   #10
Flatty
Registered User
 
Join Date: Apr 2006
Location: Redwood City, CA
Posts: 27
Re: Swapping a Cummins into a 67-72 chevy

Quote:
Originally Posted by onetonk5 View Post
go back to pirate you vodka smuggling whore


Hahahahaha... Maybe this wa a bad idea, and maybe just spending the money on a Tahoe or a Cummins truck is worth it...

idma
Flatty is offline   Reply With Quote
Old 11-01-2006, 06:00 PM   #11
alblogg
Registered User
 
alblogg's Avatar
 
Join Date: Oct 2006
Location: NC
Posts: 62
Re: Swapping a Cummins into a 67-72 chevy

Aaaaaaahhhhh yes a big Chevy 'hoe with a Cummins a hummin'....what a ride.
__________________
'07 G6 Wife's car
'00 Malibu stock, just a parts getter.
'99 Blazer LT Loaded, K&N Filter, Pioneer Super
Tuner,Viper
'88 K1500 Cheyenne, 5.0, stock, bought new
'86 Nissan 720 Trash Truck
'69 C/10 step side, 307, all original, second owner, in process of restore.



The person who says it cannot be done should not interrurt the person doing it.
Share your knowledge. It is a way to achieve immortality.


Allen- Paintman
Wrenchtwister
Broompusher
alblogg is offline   Reply With Quote
Old 11-02-2006, 06:54 PM   #12
onetonk5
Cereal Killer
 
onetonk5's Avatar
 
Join Date: Jan 2006
Location: Montgomery, Alabama
Posts: 639
Re: Swapping a Cummins into a 67-72 chevy

there was a 3/4 4x 67-72 truck on ebay with a cummins 6 not long ago.....i think a 6bt in a 72 sub ton 4x would be cooool.
onetonk5 is offline   Reply With Quote
Old 11-02-2006, 09:16 PM   #13
Rod
 
Join Date: Dec 1999
Location: Eastern - Manitoba Canada, Winnipeg
Posts: 4,369
Re: Swapping a Cummins into a 67-72 chevy

It would look something like this when done.
not mine., just had a pic. Dont have any details on how it was done.
Attached Images
  
__________________
Senior active founding member.
70 3/4 ton GMC Suburban 4x4 250/4 spd.
71 1/2 ton Suburban Chevy 4x4, 350/350
72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane
2005 FLSTSCI Harley Springer
85 FXSB Harley Lowrider
72 Triumph 650 Bonneville 5spd
"Poor people don't have hobbies" Quote from wife.

Last edited by Rod; 11-02-2006 at 09:21 PM.
Rod is offline   Reply With Quote
Reply

Bookmarks

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 03:57 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com