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: 8,537	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

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.