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09-29-2003, 01:00 PM
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#1 |
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Registered User
Join Date: Dec 2001
Location: New Richmond, WI
Posts: 547
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K10 vs. K20???
Besides spings, are there any differences between a K10 frame and a K20 frame? (thickness of the steel, height of frame rails etc.)
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Eric 1969 K20, 465/205 package |
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09-29-2003, 02:04 PM
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#2 |
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user # 2756
 
Join Date: Jun 2001
Location: Chesapeake, Virginia
Posts: 4,612
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I think yukon jack posted something a while ago about frame tensile strength between the K10 and K20.
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm 
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09-29-2003, 04:50 PM
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#3 |
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Post Whore
Join Date: Feb 2000
Location: Rose Hill, KS, USA
Posts: 12,686
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Yep, the restoration pack shows some K10 and K20 frames differed by what is called section modulus. I think that measures the steel's ability to flex or something like that.
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1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14 |
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09-29-2003, 04:56 PM
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#4 |
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Registered User
Join Date: Dec 2001
Location: New Richmond, WI
Posts: 547
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So they are dimensionally the same, but differ in the type of steel or heat treating?
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Eric 1969 K20, 465/205 package |
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09-29-2003, 05:48 PM
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#5 |
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user # 2756
Join Date: Jun 2001
Location: Chesapeake, Virginia
Posts: 4,612
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I think the front springs were the same; either 2 or 3 leaves.
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm
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09-30-2003, 09:16 AM
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#6 |
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Registered User
Join Date: Feb 2001
Location: Lake Stevens,WA 98258 North of Seattle
Posts: 833
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I thought I heard that the K20 frame allowed a thicker cab mount bushing, yet the cab was the same? Don't know for sure.
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Marysville, WA (Dan72cst@hotmail.com) 72 4wd Blazer CST 350/350 72 4wd Chevy LWB 350/350 68 2wd Chevy LWB 327/400 |
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09-30-2003, 10:48 AM
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#7 |
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Registered User
Join Date: Sep 2003
Location: COVINGTON GEORGIA
Posts: 477
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they're the same on pickups
my brother in law has a 79 1/2 and a 78 3/4 frame in his yard and they are exactly the same. atleast dimession wise. a 1 ton is a bigger frame the metal is thicker and the chanel part is taller.
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