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06-13-2018, 10:56 PM | #1 |
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Join Date: Jun 2017
Location: Sparta, Mi.
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K10 rear springs q and a
Ok guys, im at a loss please answer if you can. My 1970 k10, it could have come with 52 or 56 inch rear springs originally, correct? I have 2 frames one a k10 and one a k20 both have 52 inch springs, mine however under my truck has 56 inch springs. Im looking to buy a lift kit and was about to order it when i realized the kit claims to fit k20 trucks, but does not say it fits k10s. I only measured my springs to see though because i read somewhere they could be either size. My question is 56 inch springs DID come on k10s, right? I told skyjacker it was a k10 when asking about the kit and was not corrected.... the kit im looking at is a c260aksd-m - 6in. (Skyjacker) Thanks guys. Im not crazy, right?
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06-14-2018, 09:19 AM | #2 |
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Join Date: Dec 1999
Location: Austin, TX, USA
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Re: K10 rear springs q and a
I don't think the 56" spring ever came on a 69-72 K series truck. They were a '73 and up addition IME. I'm interested to see what others say.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
06-14-2018, 12:43 PM | #3 |
20' Daredevil (Ret)
Join Date: May 2003
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Re: K10 rear springs q and a
^^ That sounds right to me. Stock spring length is 52" and K10 & K20 packs are interchangeable as far as fit. Thickness & load capacity will vary of course.
OP, if your truck has 56" springs, they have been swapped in by a previous owner.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
06-15-2018, 08:29 AM | #4 |
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Re: K10 rear springs q and a
Ok, so i called skyjacker again to ask about this. They say that 1969-72 used 52 or 56 on k10s, but, 1967-68 used a different length unknown to the guy i was talking to. He said they did not make a spring for those two years because with thier age and limited year range it wouldnt be profitable for them. But 56s did according to them come on some 69-72s, he says it is more or less still like a big 10 or heavy half (towing package) kind of deal, it wasnt to get around emissions like those, but still used the larger springs. Can anyone tell me what length spring was used on the rear in 67-68? Im just curious.
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06-15-2018, 11:42 AM | #5 | |
All about them K’s
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Re: K10 rear springs q and a
Quote:
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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s Last edited by 57taskforce; 06-15-2018 at 11:48 AM. |
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06-15-2018, 12:31 PM | #6 |
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Re: K10 rear springs q and a
I do trust what im told on this site, im just confused, my spring perches are factory riveted to my frame still in a location 4 inches wider than the other k10 frame i have, the other chassis i have is from a 1971 or 72, has 52 inch springs my truck is a 1970 and the springs that are on it measure 57-1/2. I know my trucks chasis is at least a 1970 chasis because it has drum front brakes and the dana 44 front pulls numbers reading 1969 for manufacture. So, it should be a 69 or 70. My truck is titled as 1970, not that things couldnt have been changed over 48 years. You are saying the spring WIDTH was the difference in 67 and 68? The lengths remained the same? My frame, also, is identical to the 71 or 72 that i have in most other ways, with the exception of no clearance dimples where the steering gear mounts, forged steel front - front leaf spring mounts instead of stamped, and the spacing of the rear leaf mounts. ALL mounts are still factory riveted in location. Im CERTAIN my frame is a 67-72 frame, and im sure it requires a spring longer than 52 inches, im just trying to be certain at this point i dont have a 67 or 68 frame which takes the springs that arent manufactured in lift form.
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06-15-2018, 12:40 PM | #7 |
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Re: K10 rear springs q and a
*footnote* i also have a k20 chassis which has 52 inch springs and the perches in the same location as the 71-72 k10 chassis i own. So, 1 of 3 has the longer springs. A k10 and k20 with 52" and my truck as described.
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06-15-2018, 03:04 PM | #8 | |
All about them K’s
Join Date: Jun 2014
Location: Land of Entrapment
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Re: K10 rear springs q and a
Quote:
__________________
Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s |
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06-15-2018, 03:20 PM | #9 |
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Join Date: Dec 1999
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Re: K10 rear springs q and a
If memory serves, the 67-68 springs were 56-58" long somewhere. Sounds like that 70 chassis might actually be a 67-68.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
06-17-2018, 12:06 AM | #10 | |
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Join Date: Jun 2017
Location: Sparta, Mi.
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Re: K10 rear springs q and a
Quote:
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06-17-2018, 12:22 AM | #11 |
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Join Date: Jun 2017
Location: Sparta, Mi.
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Re: K10 rear springs q and a
Well, i hope my lift i ordered will fit, i bought the 56 inch springs. I can always relocate the brackets if necessary, but i didnt want to remove the factory rivets. If the width is different, i have the brackets on the other frames. One way or the other ill be ok i guess, i just wanted to know what i had. Its becoming clear that my truck is very pieced together, which is really pretty ok with me, i never plan to sell anyway, and its more of a sand dune toy than an investment truck, i just happen to like this body style more than any other. I put a 400sbc with a th400 and np205 in it anyway and when i bought it it had a 250 with an sm465 and np205 in it, so im obviously not too concerned with originality, i just want a nice truck that is what i want to have. I own a 72 k5 blazer as well, i just love that body style chevy, my wife wants a suburban i just havent found the right deal on one yet for her. I will take some photos of the frame and spring perches to show you guys what im talking about since i have some interest in that when i get it up on the hoist tomorrow, let me know what you think. Those numbers on the frame should be on the top flat of the frame over the gearbox, correct?
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06-17-2018, 12:41 AM | #12 | |
All about them K’s
Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,415
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Re: K10 rear springs q and a
Quote:
__________________
Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s |
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06-17-2018, 04:26 PM | #13 |
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Re: K10 rear springs q and a
FWIW, I measured my '69 today, and the springs are 52". The springs are not original, but the hangers are.
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'69 Longstep K-10: 327/SM465/T-221/Closed Knuckle Dana44/12-bolt. |
06-17-2018, 08:32 PM | #14 | |
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Re: K10 rear springs q and a
Quote:
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