Frame Dimensions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**1970greenc10** · 07-08-2012, 12:47 AM

I have a 69 1/2 ton 4x4, and the frame from the bed back is pretty pitted. It's not rotted all the way through but it can't be very strong. Are the frame rails from a 73-87 frame the same size (height, width) I was thinking I could just cut the pitted sections out and weld in pieces from a doner frame and brace it good. 67-72 4x4 frames are hard to come by in New York that aren't rotten.
Thanks,Marty

SunSoaked · 07-09-2012, 10:26 AM

Quote:

Originally Posted by 1970greenc10

I have a 69 1/2 ton 4x4, and the frame from the bed back is pretty pitted. It's not rotted all the way through but it can't be very strong. Are the frame rails from a 73-87 frame the same size (height, width) I was thinking I could just cut the pitted sections out and weld in pieces from a doner frame and brace it good. 67-72 4x4 frames are hard to come by in New York that aren't rotten.
Thanks,Marty

No, they are not the same. I am in the process of swapping an 87 suspension into my 69 1/2 ton 4x4. They are taller in places and dont have the same curvature over the wheelwells. I ended up swapping the springs, axles and mounting brackets. Needless to say I got introduced to removing rivots (from both frames) the hard way.

HEISEL · 07-09-2012, 02:42 PM

Check craigslist, I see 4x4 frames on there time to time. I live in kansas city and i've seen them on there for $200 i think. if you need a new one.

**1970greenc10** · 07-09-2012, 10:49 PM

Thanks guys I'll have to keep my eye out for one, I was hopeing for a cheaper easier route, 4x4 frames are hard to come by in the rust belt, we turned them all into plow trucks and destroyed them.

andrewmp6 · 07-11-2012, 02:22 AM

Would a 2wd frame work since he just needs the back half of a frame?

**1970greenc10** · 07-11-2012, 09:41 PM

I'm pretty sure the 2wd frames bump out above the rear axle while the 4wd frame stays straight. Not sure though maybe someone can confirm? Thanks for the suggestion though, if they are the same, that saves a lot of looking.

Monty · 07-12-2012, 07:53 AM

the '72 2wd frame is much different in the rear axle area than the 4x4 frames. i'd assume the '69s are different also. it is difficult to adapt spring hangars to the front end of the rear springs on the 2wd frame because it kicks out at about 5* and up at 24* right where the spring hangars need to mount.

07-08-2012, 12:47 AM	#1
1970greenc10 Senior Member Join Date: Oct 2008 Location: Forestville, NY Posts: 225	Frame Dimensions I have a 69 1/2 ton 4x4, and the frame from the bed back is pretty pitted. It's not rotted all the way through but it can't be very strong. Are the frame rails from a 73-87 frame the same size (height, width) I was thinking I could just cut the pitted sections out and weld in pieces from a doner frame and brace it good. 67-72 4x4 frames are hard to come by in New York that aren't rotten. Thanks,Marty __________________ My Chevys 79 caprice classic 70 c/10 69 k/10 03 silverado

07-09-2012, 02:42 PM	#3
HEISEL Registered User Join Date: Feb 2011 Location: Blue springs, mo Posts: 56	Re: Frame Dimensions Check craigslist, I see 4x4 frames on there time to time. I live in kansas city and i've seen them on there for $200 i think. if you need a new one. __________________ 1972 k/10 4x4 swb 2011 camaro SS/RS M6

07-09-2012, 10:49 PM	#4
1970greenc10 Senior Member Join Date: Oct 2008 Location: Forestville, NY Posts: 225	Re: Frame Dimensions Thanks guys I'll have to keep my eye out for one, I was hopeing for a cheaper easier route, 4x4 frames are hard to come by in the rust belt, we turned them all into plow trucks and destroyed them. __________________ My Chevys 79 caprice classic 70 c/10 69 k/10 03 silverado

07-11-2012, 02:22 AM	#5
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: Frame Dimensions Would a 2wd frame work since he just needs the back half of a frame?

07-11-2012, 09:41 PM	#6
1970greenc10 Senior Member Join Date: Oct 2008 Location: Forestville, NY Posts: 225	Re: Frame Dimensions I'm pretty sure the 2wd frames bump out above the rear axle while the 4wd frame stays straight. Not sure though maybe someone can confirm? Thanks for the suggestion though, if they are the same, that saves a lot of looking. __________________ My Chevys 79 caprice classic 70 c/10 69 k/10 03 silverado

07-12-2012, 07:53 AM	#7
Monty Registered User Join Date: Jun 2011 Location: Montana Posts: 78	Re: Frame Dimensions the '72 2wd frame is much different in the rear axle area than the 4x4 frames. i'd assume the '69s are different also. it is difficult to adapt spring hangars to the front end of the rear springs on the 2wd frame because it kicks out at about 5* and up at 24* right where the spring hangars need to mount.



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