A couple Cummins pictures for those interested - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TP from Cntl PA · 01-25-2007, 08:55 PM

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

FarmTruk · 01-25-2007, 09:54 PM

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 !!!

**special-K** · 01-25-2007, 09:57 PM

It`s about time you showed us that motor.I`d love to check that out up close and personal.

krue · 01-25-2007, 09:57 PM

TP from Cntl PA · 01-25-2007, 10:04 PM

Quote:

Originally Posted by special-K

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

**special-K** · 01-25-2007, 10:19 PM

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.

TP from Cntl PA · 01-25-2007, 10:24 PM

Yeah, you showed me before..............That is the same treatment my next one will get

Plus a REAL jake off a 6-71

Sport/Truck · 01-25-2007, 10:32 PM

It’s certainly not for everyone, but I like it!

ND_guy · 01-25-2007, 10:38 PM

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.

s95930 · 01-25-2007, 11:02 PM

I was thinking about doing the same kind of conversion.

BCOWANWHEELS · 01-26-2007, 12:57 AM

i,d love to hear about the o.d trans also. did you turn the 3 speed backwards ?????

breeh · 01-26-2007, 02:36 AM

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.

TP from Cntl PA · 01-26-2007, 11:48 AM

Quote:

Originally Posted by BCOWANWHEELS

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

70rs/ss · 01-26-2007, 02:07 PM

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!

01-25-2007, 08:55 PM	#1
TP from Cntl PA Registered User 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!!!!!!!!

01-25-2007, 09:54 PM	#2
FarmTruk In Memoriam... 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."*

01-25-2007, 09:57 PM	#3
special-K Special Order 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 ~

01-25-2007, 09:57 PM	#4
krue Designated A-hole! 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"

01-25-2007, 10:19 PM	#6
special-K Special Order 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 ~

01-25-2007, 10:24 PM	#7
TP from Cntl PA Registered User 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!!!!!!!!

01-25-2007, 10:32 PM	#8
Sport/Truck Sierra Grande Club 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.

01-25-2007, 10:38 PM	#9
ND_guy Tool Addiction=Money Shortage 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.

01-25-2007, 11:02 PM	#10
s95930 A-Adam A-Adam 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

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 ?????

01-26-2007, 02:36 AM	#12
breeh Recovering 67-72 Addict 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"

01-26-2007, 02:07 PM	#14
70rs/ss Registered User 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!



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