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03-02-2010, 11:05 PM
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#1 |
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Registered User
Join Date: Sep 2009
Location: Bethel Island, CA
Posts: 21
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Frame Question
This may sound like a stupid question, but what the heck!
Is the frame, (SWB or LWB), on a 67-72 10 series truck the same as the frame on a 20 series? i.e. physical size & strength? (not counting brakes and suspension), just the frame. Curious... Thanks |
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03-03-2010, 12:41 AM
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#2 |
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20' Daredevil (Ret)
 
Join Date: May 2003
Location: Jefferson State
Posts: 13,667
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Re: Frame Question
Not a stupid question at all.... it's been asked a few times here. They are the same -- the one-tons (30-series) have a larger frame (deeper, I believe), but the 10 and 20 series are the same.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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03-03-2010, 09:56 AM
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#3 |
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Junior Member
Join Date: Dec 2006
Location: Southeast Missouri
Posts: 2,436
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Re: Frame Question
The differences I have found on my '67 C-20 frame and my '71 C-10 frame are the '67 does not have the dimple for the steering box and the C-20 frame has extra braces at the cross memeber where the trailing arms mount.
The trailing arms on the C-20 are a little beefier with a plate on them and the rear cab mounts are lower on the frame. If I remember right someone on here said the '71 and '72 frames were made out of higher strength steel. Danny
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'67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E. |
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03-03-2010, 12:59 PM
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#4 |
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Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: Frame Question
     
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I'm on the Instagram- @Gearhead_Kevin |
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03-03-2010, 01:08 PM
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#5 |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,667
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Re: Frame Question
Well.... sorry about my bad advice. I coulda sworn I saw at least a few similar threads in the past where it was stated that 1/2T and 3/4T frames were the same, with 1-tons being stouter.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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03-03-2010, 01:13 PM
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#6 |
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Registered User
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,596
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Re: Frame Question
Outside of the reinforced spots that TX Firefighter pointed out they are pretty well the same.
I've seen several 3/4 ton trucks converted to 1/2 ton with suspension and axle swaps. |
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03-03-2010, 05:04 PM
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#7 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Frame Question
the 3/4 ton is slightly thicker metal, have the braces as mentioned, have lower rear cab mounts (require 3/4 ton cab mounts regardless of what mods you've done suspentionwise).
The one tons are a thicker and taller C channel. 71/72 is in fact made of slighty stronger metal |
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