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 01-25-2007, 08:55 PM   #1
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
A couple Cummins pictures for those interested

Since I am crawling along on dial up, I had to load them small or I'd be waiting all night

Truck is a '71 C-20........Was a 350/3spd...........I got upset with the lack of low end with the V-8, so I looked at the diesel option. Not a fan of GM's diesels. I really wanted a 6BT Cummins(5.9 to most people), but it was too heavy IMO, for a 4x2 chassis without major changes that I didn't want to undertake. I didn't want a 4BT(3.9) because they are rattlely and noise(I ran alot of them in backhoes), they are a good engine, I just wanted something a bit smoother. So I found a small 6 cylinder @3.4 liters........Designed as a gen-set engine it runs as smooth as silk. I got a GM adapter, ran a 4spd+ a homemade OD unit based off a 3spd Sag.........This is a project in progress, because I patched it together enough to run it so I could focus on completing my K-20 which is now done. Anyhow, we've been running it for two years, not using it much in the winter, but its run everyday in the summer time. When I tear it down for paint/mod's this spring, everything from the clutch back will be replaced with heavier parts. Even with only a realtively small engine under the hood, the monster torque on the low end tears up anything and everything. I am going to use a HD ZF-6spd with an oil cooler, plus heavy joints/shaft and carrier. Other than that, it is an amazing drive, and this engine has a sound like no other engine I've heard in a pickup...........Sounds like an IH DT idling, and barking through a straight pipe, it almost feel like you have a Big Cam Cummins under the hood on a hill. I love it. I had a few request for pictures, so if anyone needs to know anything ask, I'll try to help. I didn't find anyone who did this previous to me doing it, so I learned some things the hard way. But I have since been contacted by others who have did swaps into these with Cummins and other engines, so know about most of the don'ts I am already planning my next swap using a Screamin Jimmy
Attached Images
  
__________________
'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 01-25-2007, 09:54 PM   #2
FarmTruk
In Memoriam...
 
FarmTruk's Avatar
 
Join Date: Nov 2006
Location: Wallburg, NC
Posts: 1,216
Re: Acouple Cummins pictures for those interested

Now that is taking the road less traveled.

Congratulations on your project. I bet you feel a lot of pride when someone asks you what you got in there. Way to go !!!
__________________
'68 C10 SWB 307ci 2BBL
FarmTruk Pics Here
"You know, doing what is right is easy. The problem is knowing what is right."
FarmTruk is offline   Reply With Quote
Old 01-25-2007, 09:57 PM   #3
special-K
Special Order

 
special-K's Avatar
 
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
Re: Acouple Cummins pictures for those interested

It`s about time you showed us that motor.I`d love to check that out up close and personal.
__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed"

GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project)
GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling)
Tim

"Don't call me a redneck. I'm a rough cut country gentleman"

R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~
special-K is offline   Reply With Quote
Old 01-25-2007, 10:04 PM   #4
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: Acouple Cummins pictures for those interested

Quote:
Originally Posted by special-K View Post
It`s about time you showed us that motor.I`d love to check that out up close and personal.
Where were you at Special K..........I had them on here in the enlarged form acouple times before Had acouple of newcomers ask about it, so had to do a "Re-post" for pictures
__________________
'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 01-25-2007, 09:57 PM   #5
krue
Designated A-hole!
 
krue's Avatar
 
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,448
Re: Acouple Cummins pictures for those interested

__________________
"If it ain't broke, fix it 'til it is!"
Being stupid ain't illegal.

We're Still Debt Free Except for the House!!!
www.daveramsey.com

70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e
93 S-10 "Poppaw's Truck"
krue is offline   Reply With Quote
Old 01-25-2007, 10:19 PM   #6
special-K
Special Order

 
special-K's Avatar
 
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
Re: Acouple Cummins pictures for those interested

I`m a reincarnated member here.I feel like Rumpelstiltskin.Did I ever show this Detroit on a`69 GMC?If you can get to Frederick,MD in May for the annual ATHS show he`ll be there.
__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed"

GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project)
GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling)
Tim

"Don't call me a redneck. I'm a rough cut country gentleman"

R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~
special-K is offline   Reply With Quote
Old 01-25-2007, 10:24 PM   #7
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: Acouple Cummins pictures for those interested

Yeah, you showed me before..............That is the same treatment my next one will get Plus a REAL jake off a 6-71
__________________
'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 01-25-2007, 10:32 PM   #8
Sport/Truck
Sierra Grande Club
 
Sport/Truck's Avatar
 
Join Date: Jan 2007
Location: New Mexico USA
Posts: 2,433
Re: Acouple Cummins pictures for those interested

It’s certainly not for everyone, but I like it!
__________________
1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.
Sport/Truck is offline   Reply With Quote
Old 01-25-2007, 10:38 PM   #9
ND_guy
Tool Addiction=Money Shortage
 
ND_guy's Avatar
 
Join Date: Mar 2006
Location: Grand Forks, ND
Posts: 233
Re: Acouple Cummins pictures for those interested

I would be interested in some info on your overdrive conversion. I currently have 4.56 gears, and I hate going 60mph @ 3,000rpm. Thanks in advance.
ND_guy is offline   Reply With Quote
Old 01-25-2007, 11:02 PM   #10
s95930
A-Adam A-Adam
 
s95930's Avatar
 
Join Date: Apr 2003
Location: Sarpy Co. Ne. South of Omaha
Posts: 263
Re: Acouple Cummins pictures for those interested

I was thinking about doing the same kind of conversion.
__________________
70 3/4 ton GMC Camper Special
s95930 is offline   Reply With Quote
Old 01-26-2007, 12:57 AM   #11
BCOWANWHEELS
Registered User
 
Join Date: Nov 2006
Location: KINGSPORT,TN.
Posts: 3,035
Re: A couple Cummins pictures for those interested

i,d love to hear about the o.d trans also. did you turn the 3 speed backwards ?????
BCOWANWHEELS is offline   Reply With Quote
Old 01-26-2007, 11:48 AM   #12
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: A couple Cummins pictures for those interested

Quote:
Originally Posted by BCOWANWHEELS View Post
i,d love to hear about the o.d trans also. did you turn the 3 speed backwards ?????
That is the jist of it, machined a few pieces myself for it to make it work. It works well, but shifting it is a challenge for anyone who hasn't ever driven a tri-plex in a Mack Have 9 useable speeds, You can split regular gears, but I usually go 2, 3, 4, then bump the aux. box up from 3rd(Direct Drive) to 2nd which is OD.

My brother usually splits each gear, we all like it, because it is something different, but I am going to remove it for better reliablity/ease of driveablity for everyone else who wasn't a pro gear jammer in a OTR semi

Other than my time, I only had $20 in it for a 3spd shifter. And I got 2+ years use out of it, while saving a ton of fuel
__________________
'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 01-26-2007, 02:07 PM   #13
70rs/ss
Registered User
 
70rs/ss's Avatar
 
Join Date: Dec 2004
Location: Northern AZ
Posts: 7,270
Re: A couple Cummins pictures for those interested

I have been planning a 4X4 Suburban project with a new 5.3 or 6.0 gas engine, but I have since purchased a new Dodge, so now I am going down the road of, well if I find an old doge cheap (100-200,000 miles) I can do a cummins powered 67-8 Suburban 4X4 and have a neat fuel economic Burb! I want to use all the dodge stuff, front and rear axle, hopefully a six speed etc! Looks sweet, yours is the one that showed me it could be done!
70rs/ss is offline   Reply With Quote
Old 01-26-2007, 02:36 AM   #14
breeh
Recovering 67-72 Addict
 
breeh's Avatar
 
Join Date: Oct 2000
Location: North Bend, WA
Posts: 1,788
Re: A couple Cummins pictures for those interested

That's great! After owning a Duramax, I am a diesel convert. When my 427 gets tired I am hoping to find a donor to transplant a Duramax into my '68.
__________________
68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt.

"Friends call me cruzer cuz I like fast cars and fast women"
breeh is offline   Reply With Quote
Reply

Bookmarks


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 09:22 PM.


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