Question On Frames 1968 GMC - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**1971 GMC SHORTY** · 01-26-2012, 01:45 AM

What's The Difference In A 1/2 Frame To A 1 Ton Frame..
I Found. A 1968 GMC 4 Wheeler K10... I Have All 1 Ton Leafs And Axles That I Want To Use on My Tow Rig.. But Clean 68 3/4 Tons are Hard To Find...
Going To Tow a 5th Wheel Trailer...
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**special-K** · 01-26-2012, 08:20 AM

One tone frames are made with taller rails. This has nothing to do with the springs,though. I guess you want to know if C/30s have the same eye to eye length as the K/10 and if the spring pad spread is the same. I can't answer that with any certainty,but will say you can move the rear spring hanger if they are different (I think they're the same...52") and you can move the spring pads/weld new ones if the spread is different. I know k-model frames taper in more than c-models,so springs sit closer together. Is you C/30 axle from a single wheel? I believe they will need to be moved.

**1971 GMC SHORTY** · 01-26-2012, 10:04 AM

Quote:

Originally Posted by special-K

One tone frames are made with taller rails. This has nothing to do with the springs,though. I guess you want to know if C/30s have the same eye to eye length as the K/10 and if the spring pad spread is the same. I can't answer that with any certainty,but will say you can move the rear spring hanger if they are different (I think they're the same...52") and you can move the spring pads/weld new ones if the spread is different. I know k-model frames taper in more than c-models,so springs sit closer together. Is you C/30 axle from a single wheel? I believe they will need to be moved.

Ok So The Frame Rails Are Taller That's what I Needed To No Thank You...
The Hunts On Again... need a 68 K30
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**special-K** · 01-27-2012, 08:43 AM

You know there's no such thing as 67-72 K/30,right? I think you can do what you are wanting off a 1/2 or 3/4 ton frame. The 1t frames are taller under the cab at the widest part of the frames. I'm not sure the height is any different back under the bed. I think maybe the C/30 and K-model frames have the same spread,too...maybe.

01-26-2012, 01:45 AM	#1
1971 GMC SHORTY Senior Member Join Date: Apr 2009 Location: SAN FERNANDO VALLE SOL CAL Posts: 1,064	Question On Frames 1968 GMC What's The Difference In A 1/2 Frame To A 1 Ton Frame.. I Found. A 1968 GMC 4 Wheeler K10... I Have All 1 Ton Leafs And Axles That I Want To Use on My Tow Rig.. But Clean 68 3/4 Tons are Hard To Find... Going To Tow a 5th Wheel Trailer... Posted via Mobile Device __________________ 1966 GMC K25 V6 351E Original Utility Truck 2000 C3500 Hot Rod Utility Truck 2003 ROAD KING 100th 124ci 6 Speed 145CI M/P Pro Street FXR 2002 FXDP 2007 2500HD DURAMAX. DD Studio Teamsters / Mechanic Retired GM Master Tech 20 Years Retired Ford Tech 15 Years

01-26-2012, 08:20 AM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: Question On Frames 1968 GMC One tone frames are made with taller rails. This has nothing to do with the springs,though. I guess you want to know if C/30s have the same eye to eye length as the K/10 and if the spring pad spread is the same. I can't answer that with any certainty,but will say you can move the rear spring hanger if they are different (I think they're the same...52") and you can move the spring pads/weld new ones if the spread is different. I know k-model frames taper in more than c-models,so springs sit closer together. Is you C/30 axle from a single wheel? I believe they will need to be moved. __________________ "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 ~

01-27-2012, 08:43 AM	#4
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: Question On Frames 1968 GMC You know there's no such thing as 67-72 K/30,right? I think you can do what you are wanting off a 1/2 or 3/4 ton frame. The 1t frames are taller under the cab at the widest part of the frames. I'm not sure the height is any different back under the bed. I think maybe the C/30 and K-model frames have the same spread,too...maybe. __________________ "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 ~



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