68 GMC C series questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**67sss** · 06-30-2008, 08:12 PM

how do you tell the diff between a truck 427 and the car 427? What do 68 tow hooks look like? and the tach dash has air gauge too, but also has the hand throttle and the choke, is this common on these vintage trucks?

stllookn · 06-30-2008, 09:11 PM

You must have found something very interesting...LOL! Wish I could help but here's a bump for you.

Longhorn Man · 06-30-2008, 09:17 PM

air guage was very common, it was required on all C/60 and bigger if equipped with air brakes.
But it was NEVER offered in 10 - 30 series.
The hand throttle was avalible, but not common.
The choke was on 99% (ball park guess) of 10 - 30 seris trucks in 67 and 68.
The 427 can be ID's (I'll assume it is assembled) by stamping/castiong numbers, and something on the front of the engine... has to do with the T-stat housing and hoses.... but I can't remember what it was. A photo and we'll be able to tell you pretty much instantly.
Can't help you on the hooks.

**too much stuff** · 06-30-2008, 10:47 PM

The 67-68 tow hooks are more of a C shape, and the later ones are more of a J shape. I think i have some pics about hooks in the faq.
The truck 427 may have a dual thermostat housing.
The tach dash would be from a bigger truck it sounds like.

**Bob B.** · 07-01-2008, 04:03 AM

Truck 427's are tall blocks. Yes on the dual thermostat intake manifold, and usually had a high mound water pump too (very obvious). GMC didn't use truck 427's until late '69, all GMC 4500 and larger trucks had V-6's before then.

**special-K** · 07-01-2008, 04:57 AM

Is all this on one truck?You say C-series,it`s a medium duty,I assume,like a C/60.

**67sss** · 07-01-2008, 08:39 PM

C series was just a guess. It's a tandem axle GMC with 427 badges on it. All the stuff listed is on 1 truck but not sure of the year.. It's sitting next to a barn and the farmer says he's done with it????yea right! I'll try to post pics that I have on my phone..

**too much stuff** · 07-01-2008, 11:12 PM

Are the tow hooks the kind that mount flat on top of the bumper? If so, those are pretty common and not worth much.
I think quite a few of these trucks had the manual throttle also. Keep me in mind for any emblems that may be available. Eric

06-30-2008, 08:12 PM	#1
67sss Registered User Join Date: Nov 2002 Location: Mt. Vernon, WA.. Posts: 2,322	68 GMC C series questions how do you tell the diff between a truck 427 and the car 427? What do 68 tow hooks look like? and the tach dash has air gauge too, but also has the hand throttle and the choke, is this common on these vintage trucks?

06-30-2008, 09:11 PM	#2
stllookn Saving 1 truck at a time! Join Date: Aug 2001 Location: Kent, WA Posts: 6,465	Re: 68 GMC C series questions You must have found something very interesting...LOL! Wish I could help but here's a bump for you. __________________ '68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary)

06-30-2008, 09:17 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: 68 GMC C series questions air guage was very common, it was required on all C/60 and bigger if equipped with air brakes. But it was NEVER offered in 10 - 30 series. The hand throttle was avalible, but not common. The choke was on 99% (ball park guess) of 10 - 30 seris trucks in 67 and 68. The 427 can be ID's (I'll assume it is assembled) by stamping/castiong numbers, and something on the front of the engine... has to do with the T-stat housing and hoses.... but I can't remember what it was. A photo and we'll be able to tell you pretty much instantly. Can't help you on the hooks.

06-30-2008, 10:47 PM	#4
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,718	Re: 68 GMC C series questions The 67-68 tow hooks are more of a C shape, and the later ones are more of a J shape. I think i have some pics about hooks in the faq. The truck 427 may have a dual thermostat housing. The tach dash would be from a bigger truck it sounds like. __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

07-01-2008, 04:03 AM	#5
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,321	Re: 68 GMC C series questions Truck 427's are tall blocks. Yes on the dual thermostat intake manifold, and usually had a high mound water pump too (very obvious). GMC didn't use truck 427's until late '69, all GMC 4500 and larger trucks had V-6's before then. __________________ 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.

07-01-2008, 04:57 AM	#6
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,861	Re: 68 GMC C series questions Is all this on one truck?You say C-series,it`s a medium duty,I assume,like a C/60. __________________ "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 ~

07-01-2008, 08:39 PM	#7
67sss Registered User Join Date: Nov 2002 Location: Mt. Vernon, WA.. Posts: 2,322	Re: 68 GMC C series questions C series was just a guess. It's a tandem axle GMC with 427 badges on it. All the stuff listed is on 1 truck but not sure of the year.. It's sitting next to a barn and the farmer says he's done with it????yea right! I'll try to post pics that I have on my phone..

07-01-2008, 11:12 PM	#8
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,718	Re: 68 GMC C series questions Are the tow hooks the kind that mount flat on top of the bumper? If so, those are pretty common and not worth much. I think quite a few of these trucks had the manual throttle also. Keep me in mind for any emblems that may be available. Eric __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

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