Another 4x4 Question - '71K-10 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

arkracing · 10-08-2006, 07:30 PM

I noticed yesterday that my drivers side Front spring seems to be a little weak and that the rear shackel is bent. Not enough to stop me from driving it though.

I would eventually like to convert this truck over to a K-20 (3/4 Ton - 8Lug - with the bigger brakes.

Since the availability of '73 + trucks is better than '71-'72 K-20's I figured that one would be a good doner for the axles.

Are the spring perches the same on the '73+ axles as the '72 - axles or would they have to be cut off and relocated?

What about the springs - are they the same length? - Where is a good place to get '67-'72 3/4ton Front Springs (LMC has them for about $160/ea - to the 3-leaf ones, my truck has 2-leaf ones and LMC wants $300/ea

for those) Besides we all know that LMC sells a bunch of crap.

Anybody ever do this???

qksilver · 10-08-2006, 08:35 PM

Check with some of the lift companies. I have a set of soft ride ones that i got used for 100 bucks. The front axles are the same perch width and will bolt up. the rear axles 73- are different and if I remember correctly the springs are longer also. A one ton rear is suposed to be the same width as the 72-older and a bolt in

vtblazer · 10-09-2006, 06:11 AM

Quote:

Originally Posted by arkracing

I would eventually like to convert this truck over to a K-20 (3/4 Ton - 8Lug - with the bigger brakes.

I have a complete 1972 factory 3/4 ton drive train if your interested.

For the suspension, I've got alot of stuff from Off Road Design and they've always done me right.
http://www.offroaddesign.com/catalog...rossmember.htm

Here's another good link for more stuff.
http://www.automotive-links.com/par/off/off.htm

I remember seeing a post about your new 'acquisition'

jacobs · 10-09-2006, 07:55 AM

73+ front springs are longer. I'd go to a spring rebuilder and get them rearched and have additionall leaves added. This is usually much cheeper way to go.

vtblazer · 10-12-2006, 05:26 AM

Here's a link to a site with frame dimension's.
It should help answer the later model 'fit' question for ya.

http://www.chuckschevytruckpages.com/framespecs.html

10-08-2006, 07:30 PM	#1
arkracing Weekend Warrior Join Date: Oct 2004 Location: CT Posts: 1,787	Another 4x4 Question - '71K-10 I noticed yesterday that my drivers side Front spring seems to be a little weak and that the rear shackel is bent. Not enough to stop me from driving it though. I would eventually like to convert this truck over to a K-20 (3/4 Ton - 8Lug - with the bigger brakes. Since the availability of '73 + trucks is better than '71-'72 K-20's I figured that one would be a good doner for the axles. Are the spring perches the same on the '73+ axles as the '72 - axles or would they have to be cut off and relocated? What about the springs - are they the same length? - Where is a good place to get '67-'72 3/4ton Front Springs (LMC has them for about $160/ea - to the 3-leaf ones, my truck has 2-leaf ones and LMC wants $300/ea for those) Besides we all know that LMC sells a bunch of crap. Anybody ever do this??? __________________ -'07 GMC Sierra K2500HD -'66 C10 Suburban -'68/'71 K20 Service Bed Project -'69 Chevy C30 Mason Dump -'33Ford P/U 396ChevyPowered

10-08-2006, 08:35 PM	#2
qksilver Senior Member Join Date: Dec 2004 Location: Southern Pines NC Posts: 3,853	Re: Another 4x4 Question - '71K-10 Check with some of the lift companies. I have a set of soft ride ones that i got used for 100 bucks. The front axles are the same perch width and will bolt up. the rear axles 73- are different and if I remember correctly the springs are longer also. A one ton rear is suposed to be the same width as the 72-older and a bolt in

10-09-2006, 07:55 AM	#4
jacobs Registered User Join Date: Sep 2005 Location: 9000' Mountain Man Posts: 326	Re: Another 4x4 Question - '71K-10 73+ front springs are longer. I'd go to a spring rebuilder and get them rearched and have additionall leaves added. This is usually much cheeper way to go.

10-12-2006, 05:26 AM	#5
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,538	Re: Another 4x4 Question - '71K-10 Here's a link to a site with frame dimension's. It should help answer the later model 'fit' question for ya. http://www.chuckschevytruckpages.com/framespecs.html



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