C40-c70? 67-72 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

koolky · 11-22-2007, 09:54 PM

I was thinking about restoring an old heavy-duty truck from 67-72 and I really dont know much about them. What engines came in them? the same as the normal C10-30's? what are the GVW's? what wheel bases are there? are the cabs that same as normal C10-30's? Any info is nice to know.

1969k10stepside · 11-22-2007, 10:00 PM

They could have 350s,I assume smaller V8s too,V6s,Seen one or 2 inline 6s,all the way up to tall deck big block motors...The cabs are similar but no matter the year,they had the small back window like '67 10-30 series..The floor tunnel,and firewall area are also different.The doors are the same,but the there is a notch in the front of the doors on them for the fenders where the smaller trucks don't.I want to someday have a C/40 +.I found a real nice original paint one nearby for $1500 and there is many old grain truck 67-72 C/40+ trucks running around in rougher shape.During the harvesting times,you see a whole bunch of them running around,here.I'd really like to have one with the NAPCO 4wd conversion though.

koolky · 11-22-2007, 10:07 PM

I ahve seen them with a 283. Also when they say 4 +2 trans, im thinking they mean 4 speed trans and 2 speed rear-end. am i right?

Rokcrln · 11-22-2007, 10:16 PM

I have also thought about doing one of these but in a top kick style. I would build a crew cab (4door) with a fleet side bed w/ step fenders as needed to cover teh duels. I would then run a Cummins diesel and alison trans or somthing. Change it over to 10 lug rims and have one heck of a trailer hauler

Kevin
LFD Inc.

koolky · 11-22-2007, 10:19 PM

I like that idea Rokcrln

67_C-30 · 11-22-2007, 11:43 PM

I have a 67 C-50 wrecker. Like the other trucks, 67's had no side markers. Mine has a GVWR at 19,500 and came with a 292 L6/ 4 speed/ 2 speed rearend.

These bad boys look absolutely awesome converted to a dually pickup!

67_C-30 · 11-22-2007, 11:47 PM

Quote:

Originally Posted by Rokcrln

I have also thought about doing one of these but in a top kick style. I would build a crew cab (4door) with a fleet side bed w/ step fenders as needed to cover teh duels. I would then run a Cummins diesel and alison trans or somthing. Change it over to 10 lug rims and have one heck of a trailer hauler

Kevin
LFD Inc.

They already have a 10 lug pattern, but they only use 5 lugs on the front. The rear has 10 lugs. A 4 door C/40 - C/50 would be so sweet - and we all know you could do it!!

1969k10stepside · 11-22-2007, 10:16 PM

Yeah,4spd w/ 2 speed rears

kehstr · 03-04-2016, 05:42 PM

Quote:

Originally Posted by 1969k10stepside

Yeah,4spd w/ 2 speed rears

How do they do a 2 speed rear end?

hugger6933 · 03-04-2016, 06:42 PM

Splitters and torque multipliers

**special-K** · 11-23-2007, 06:30 AM

To be correct,these are known as medium duty trucks.HDs are the 80-series and up.They had 292,current SBC(not 307),366BBC,tall deck BBC,and maybe a Detroit diesel?

Shyguy · 11-23-2007, 10:15 AM

I too would like a C-40 or 50, I got the bug since I saw this one posted by someone on this site.

Danny - Southeast Missouri

koolky · 11-23-2007, 03:39 PM

Quote:

Originally Posted by special-K

To be correct,these are known as medium duty trucks.HDs are the 80-series and up.They had 292,current SBC(not 307),366BBC,tall deck BBC,and maybe a Detroit diesel?

So did 40-70 come with the diesel or only the 80 up (90?). Alos what dose it mean tall deck? longer rods or longer stroke?

1969 GMC · 11-23-2007, 07:52 PM

Quote:

Originally Posted by koolky

So did 40-70 come with the diesel or only the 80 up (90?). Alos what dose it mean tall deck? longer rods or longer stroke?

The 366 and the 427 are both tall deck, truck only motors.

I *think* the Detroit Diesel available was the 4-53. There may have been others, but I have definitely seen a (year unknown) C70 with a 5 speed and a 4-53.

PanelDeland · 11-23-2007, 07:33 PM

longer cylinders

**WorkinLonghorn** · 11-23-2007, 07:58 PM

Here's the standard and optional offerings through C60 for 1969;

P.S. The model 13680 was the El Camino.

**Bob B.** · 11-23-2007, 09:59 PM

The DH 478 listed is the infamous Toroflow. It was a diesel version of the GMC V-6. Rare now, and very tough to find parts for. GMC didn't make a version of this medium duty truck (with the 67-72 pickup cab) until 1970. The '70-'72 GMC's would have offered all the Chevy engines, plus the GMC V-6.

woodridge · 11-24-2007, 09:27 PM

Quote:

Originally Posted by Bob B.

The DH 478 listed is the infamous Toroflow. It was a diesel version of the GMC V-6. Rare now, and very tough to find parts for.

One of our neighbors bought one of these years ago (mid 70's) that had swallowed a valve. Remarkably, there was no damage to the cylinder wall. They replaced the piston and both valves in that cylinder and ran it for years until it finally spun a rod bearing. Slow as snot but didn't know what a load was.

koolky · 11-24-2007, 09:50 PM

What axel do they put in the front end of those NAPCO trucks?

ChevLoRay · 11-25-2007, 10:37 PM

The 3-53 Detroit Diesel is a 3-cylinder engine. The old Gama Goats that we had in our Guard unit had this engine, tied to an SM-465 gearbox. I used to toy around with the idea of putting one in my old '65 pickup....but it never happened.

A diesel would sound sweet, with a 4 or 5-speed gearbox and a 2-speed axle..maybe a 4-speed auxillary box behind the primary box, but the aux boxes are crash boxes with no synchros. Kinda sux if you don't get the clutch action and fuel feed just right, especially when you downshift.

cstanley · 11-23-2007, 11:14 PM

i've wanted to do one of these for a while... with a sexy stretched '71-'72 style eggcrate grille...

**special-K** · 11-24-2007, 07:30 AM

That`s pretty much what the GMCs had.Find one of those.

My72BB · 11-24-2007, 09:48 AM

I just found a cab and chassis along side the road in a farmers field with most everything still on the truck. So I stopped to see what was left since it had been retired many years ago...I noticed it still had the dash cluster...Then I noticed it was the detroit under the hood...The dash cluster had the factory air gauge and a factory diesel tach which went up to 4k. Way cool! It also had the radio delete...I could not find the owner so maybe I will check it out on my next trip.

A good friend of the family bought a 70 GMC 2 ton and 70 GMC 1/2 new for his business. The 2 ton had a 350 2bbl with governer. Excellent motor for hot rodding as it had the 4 bolt mains and even thought it had the 2 bbl it had large valve heads. Only problem with the small blocks in the bigger trucks is they worked there ass off and rarely saw 50k miles before needing a rebuild or replacement as the rods tended to exit the oil pan when the engine was done.

koolky · 11-24-2007, 08:17 PM

So the c40 is a 1.5ton? or a 2 ton? And im seeing a few diferent length of trucks, dose anyone know the diferent wheelbases. Also ive seen alot of 4 speed trucks and a few 5 speeds, are there any tree speeds?

67_C-30 · 11-24-2007, 08:46 PM

To my knowledge there were no three speeds, unless some of them got Autos. I have seen an auto in one though. I actually couldn't tell what the different wheelbases are, but I'm pretty sure there nhever any of the made short enough to put a pickup box on directly.

11-22-2007, 09:54 PM	#1
koolky 67-72 Addicted Join Date: Oct 2007 Location: Guelph Ontario Posts: 256	C40-c70? 67-72 I was thinking about restoring an old heavy-duty truck from 67-72 and I really dont know much about them. What engines came in them? the same as the normal C10-30's? what are the GVW's? what wheel bases are there? are the cabs that same as normal C10-30's? Any info is nice to know. Attached Images

11-22-2007, 10:00 PM	#2
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,020	Re: C40-c70? 67-72 They could have 350s,I assume smaller V8s too,V6s,Seen one or 2 inline 6s,all the way up to tall deck big block motors...The cabs are similar but no matter the year,they had the small back window like '67 10-30 series..The floor tunnel,and firewall area are also different.The doors are the same,but the there is a notch in the front of the doors on them for the fenders where the smaller trucks don't.I want to someday have a C/40 +.I found a real nice original paint one nearby for $1500 and there is many old grain truck 67-72 C/40+ trucks running around in rougher shape.During the harvesting times,you see a whole bunch of them running around,here.I'd really like to have one with the NAPCO 4wd conversion though. Last edited by 1969k10stepside; 11-22-2007 at 10:15 PM.

11-22-2007, 10:07 PM	#3
koolky 67-72 Addicted Join Date: Oct 2007 Location: Guelph Ontario Posts: 256	Re: C40-c70? 67-72 I ahve seen them with a 283. Also when they say 4 +2 trans, im thinking they mean 4 speed trans and 2 speed rear-end. am i right?

11-22-2007, 10:16 PM	#4
Rokcrln Senior Member Join Date: Jul 2005 Location: Winters Ca. 95694 Posts: 4,843	Re: C40-c70? 67-72 I have also thought about doing one of these but in a top kick style. I would build a crew cab (4door) with a fleet side bed w/ step fenders as needed to cover teh duels. I would then run a Cummins diesel and alison trans or somthing. Change it over to 10 lug rims and have one heck of a trailer hauler Kevin LFD Inc.

11-22-2007, 10:19 PM	#5
koolky 67-72 Addicted Join Date: Oct 2007 Location: Guelph Ontario Posts: 256	Re: C40-c70? 67-72 I like that idea Rokcrln

11-22-2007, 11:43 PM	#6
67_C-30 I have a radical idea! Join Date: Jan 2005 Location: Sweet Home Alabama! Posts: 6,513	Re: C40-c70? 67-72 I have a 67 C-50 wrecker. Like the other trucks, 67's had no side markers. Mine has a GVWR at 19,500 and came with a 292 L6/ 4 speed/ 2 speed rearend. These bad boys look absolutely awesome converted to a dually pickup! Attached Images __________________ '67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club!

11-22-2007, 10:16 PM	#8
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,020	Re: C40-c70? 67-72 Yeah,4spd w/ 2 speed rears

03-04-2016, 06:42 PM	#10
hugger6933 Registered User Join Date: Oct 2008 Location: Marianna Arkansas Posts: 7,279	Re: C40-c70? 67-72 Splitters and torque multipliers

11-23-2007, 06:30 AM	#11
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: C40-c70? 67-72 To be correct,these are known as medium duty trucks.HDs are the 80-series and up.They had 292,current SBC(not 307),366BBC,tall deck BBC,and maybe a Detroit diesel? __________________ "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 ~

11-23-2007, 10:15 AM	#12
Shyguy Junior Member Join Date: Dec 2006 Location: Southeast Missouri Posts: 2,436	Re: C40-c70? 67-72 I too would like a C-40 or 50, I got the bug since I saw this one posted by someone on this site. Danny - Southeast Missouri Attached Images

11-23-2007, 07:33 PM	#15
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: C40-c70? 67-72 longer cylinders __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

11-23-2007, 07:58 PM	#16
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,883	Re: C40-c70? 67-72 Here's the standard and optional offerings through C60 for 1969; P.S. The model 13680 was the El Camino. __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. Last edited by WorkinLonghorn; 11-23-2007 at 08:00 PM.

11-23-2007, 09:59 PM	#17
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,348	Re: C40-c70? 67-72 The DH 478 listed is the infamous Toroflow. It was a diesel version of the GMC V-6. Rare now, and very tough to find parts for. GMC didn't make a version of this medium duty truck (with the 67-72 pickup cab) until 1970. The '70-'72 GMC's would have offered all the Chevy engines, plus the GMC V-6. __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.

11-24-2007, 09:50 PM	#19
koolky 67-72 Addicted Join Date: Oct 2007 Location: Guelph Ontario Posts: 256	Re: C40-c70? 67-72 What axel do they put in the front end of those NAPCO trucks?

11-25-2007, 10:37 PM	#20
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: C40-c70? 67-72 The 3-53 Detroit Diesel is a 3-cylinder engine. The old Gama Goats that we had in our Guard unit had this engine, tied to an SM-465 gearbox. I used to toy around with the idea of putting one in my old '65 pickup....but it never happened. A diesel would sound sweet, with a 4 or 5-speed gearbox and a 2-speed axle..maybe a 4-speed auxillary box behind the primary box, but the aux boxes are crash boxes with no synchros. Kinda sux if you don't get the clutch action and fuel feed just right, especially when you downshift. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.



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11-23-2007, 11:14 PM	#21
cstanley Senior Member Join Date: Oct 2005 Location: Austin, TX Posts: 1,229	Re: C40-c70? 67-72 i've wanted to do one of these for a while... with a sexy stretched '71-'72 style eggcrate grille... __________________ "Anybody who would paint his truck like this, would go to a minister's funeral dressed in feathers!" - Big Enis Burdett '72 Blazer Restoration Blog: http://sportchicken.blogspot.com/

11-24-2007, 07:30 AM	#22
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: C40-c70? 67-72 That`s pretty much what the GMCs had.Find one of those. __________________ "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 ~

11-24-2007, 09:48 AM	#23
My72BB Registered User Join Date: Oct 2007 Location: Fairfield, PA Posts: 503	Re: C40-c70? 67-72 I just found a cab and chassis along side the road in a farmers field with most everything still on the truck. So I stopped to see what was left since it had been retired many years ago...I noticed it still had the dash cluster...Then I noticed it was the detroit under the hood...The dash cluster had the factory air gauge and a factory diesel tach which went up to 4k. Way cool! It also had the radio delete...I could not find the owner so maybe I will check it out on my next trip. A good friend of the family bought a 70 GMC 2 ton and 70 GMC 1/2 new for his business. The 2 ton had a 350 2bbl with governer. Excellent motor for hot rodding as it had the 4 bolt mains and even thought it had the 2 bbl it had large valve heads. Only problem with the small blocks in the bigger trucks is they worked there ass off and rarely saw 50k miles before needing a rebuild or replacement as the rods tended to exit the oil pan when the engine was done.

11-24-2007, 08:17 PM	#24
koolky 67-72 Addicted Join Date: Oct 2007 Location: Guelph Ontario Posts: 256	Re: C40-c70? 67-72 So the c40 is a 1.5ton? or a 2 ton? And im seeing a few diferent length of trucks, dose anyone know the diferent wheelbases. Also ive seen alot of 4 speed trucks and a few 5 speeds, are there any tree speeds?

11-24-2007, 08:46 PM	#25
67_C-30 I have a radical idea! Join Date: Jan 2005 Location: Sweet Home Alabama! Posts: 6,513	Re: C40-c70? 67-72 To my knowledge there were no three speeds, unless some of them got Autos. I have seen an auto in one though. I actually couldn't tell what the different wheelbases are, but I'm pretty sure there nhever any of the made short enough to put a pickup box on directly. __________________ '67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club!

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