2 Inch Standard Suspension System 73-87(91) K5, K10, K20, and Suburban with D60 axle With Push Pull Steering
4 Inch Standard Suspension System 73-87(91) K5, K10, K20, and Suburban with D60 axle With Push Pull Steering
Get a good ride all on a budget!
We have hand picked the products to give you a decent ride without breaking the bank.
You can also choose the products you want, that way you don't have to buy things you may already have.
(Click to expand)
What are the benefits of the Offroad Design Standard Lift System?
Good ride without breaking the bank
We select great quality products that will give your rig a good ride. We make it so you can select or not select parts. That way you dont have to buy a whole "kit" with things you do not need.
Mix and Match
No generic off the shelf lift here, we let you pick the items that work best for your project!
Through our years of working with these trucks we have selected the products that they can really benefit from!
The Spring of choice for this kit is the Skyjacker Soft ride. They offer a great ride with some good flex. these springs will not work with cummins or duramax swapped trucks.
52 and 56 inch rear springs
The options for the rear lift are either the shackle flip or a set of rear springs. The shackle flip will net you 4" taller in the rear than you are right now and will also retain your stock spring rate/towing capacity. With the shackle flip sometimes the axle moves forward in the wheel-well, a zero rate(gains 1" of lift) or axle offset plate (doesn't add lift height) can be used to re-center the axle. If your rear springs are worn out we recommend going with the lifted springs, keep in mind lifted springs have a higher spring rate so they will be a little stiffer.
What are the HD shackles and Greaseable Kevlar Bushings?
Heavy Duty Front Shackle Kit
Our Heavy Duty Front Shackle kit is just that, Heavy Duty! These are great replacements for the flimsy stock shackles that come with these trucks. We add a .5" to the length of the shackle to help with frame clearance (don't worry we account for the length in the build of the springs). The plates are zinc plated gold for long lasting quality We use better than grade 8 bolts with a high head for the grease zerk The sleeves are made from chromoly tubing To "top" it all off we use a top lock nut
Our Kevlar bushings are a high tensile strength bushing that is built to last! They are also soft enough to not hurt the ride. These bushings are designed with grease channels to help flow to all parts of the spring eye
Bilstein Shock Info
Why use Bilstein shocks
Bilstein is a great all-around shock that is extremely durable. We have selected a valving that is an amazing pair with our custom springs and offers good on and off road ride
Do I need the extended shock mounts?
The stock shock mounts are pretty low on the frame limiting travel of the suspension. This results in lower ride quality and not getting full use of your suspension. Using the extended shock mounts ensures that your suspension will not be limited by the shocks. The extended shock mounts are a benefit for both on and off road vehicles. The extended shock mounts are a bolt on application but do require drilling and cutting. More information on this under product attachments at the bottom of the page.
Measuring Spring Length
Throughout the models there were a couple spring lengths for the rear. The best way to know for sure what you have is to measure your springs. The proper way to measure would be bolt to bolt following the arch of the spring. Do not measure straight across. One way of doing this is using a piece of string to follow the contour and then measuring the spring
What banjo bolt do I have?
Our lift systems come with the option of Stainless steel braided brake lines. These lines are DOT approved and pressure tested for leaks. These line will connect directly to your stock hard lines. You will need to select what size banjo bolt fitting you have. As a rule of thumb 1978 and older trucks got 7/16 banjos and 1979 and later got 10mm, to be certain you should measure the threads of your banjo bolt. This can not be determined by what size wrench is on the bolt head. You will need to measure the threads with a caliper like pictured
At this lift height a drop pitman arm is needed to correct steering
33s and smaller
No trimming required
Trimming of front and rear of fender opening
37s and larger
Drive Shaft Modification
With lifted vehicles there is always a chance of a longer drive shaft being needed for the front. Typically the rear drive shaft still works but it is worthwhile checking to make sure.
After lifting a vehicle the angle of the drive shaft typically changes. Sometimes the pinion may need to be shimmed to prevent vibration. This cant be checked until after everything has all been installed. We do carry shims to help correct if needed.
What is this kit for?
1973-1987(91) 1/2 ton and 3/4 ton trucks
This kit will work with 1973-1987(91) 1/2 and 3/4 ton squarebody trucks and SUVs. This will not work with the one ton (k30) applications. The applications would be K5 blazer, Jimmy, m1009, K10, K20, v10, v20, v1500, v2500, suburban 1500 and 2500
GM Dana 60 Kingpin front axles only
This kit will work with 1973-1987(91) 1/2 and 3/4 ton squarebody trucks and SUVs that have a GM Dana 60 axle either swapped in. This will not work with any of the Dana 44 or 10 bolt front axles. The axles that does work is the GM Dana 60 front axle and 14 bolt rear axle.
HD front shackles and main eye bushings
The tough country springs come with poly bushings but if you would like to upgrade to our greaseable kevlar bushings and Heavy Duty shackles we offer that as a kit.
Rear greaseable kevlar bushings and Super Shackles
You can use the stock rear shackle but if you want a stronger upgrade we offer the super shackles. The 4.5" long shackle would be the correct one to use in this kit. The 6" shackle will not work. The 52" rear Skyjacker springs have a 1.5" eye on each end the 56" have 1.75". Our Super shackles also use a 1.5" eye. Your stock springs should be measured to find spring eye diameter. Looking to add our Kevlar bushings to your leaf springs but don't know your spring eye ID? Here is a quick way to find out without pulling apart your truck.
Measure the OD of the spring eye,
in this case 2"
Then measure the thickness of the leaf 1/4" on this truck.
Now subtract 2 Xs the thickness from the spring eye OD
2 x .25 = .5
2" - .5" = 1.5"
So this spring needs 1.5" bushings.
*Make sure to do this on each spring eye because they can be different
Steering box brace
It is extremely common for the frames to crack right behind the steering box on these trucks. Adding the box brace helps prevent that from happening
It is also common for the frames to crack at the rear shocks. Adding the brace can prevent that from happening. NOTE: Will NOT work on suburbans or K30s.
|U Bolt instructions||178.2 KB||Download|
|U Bolt Instructions||docx||25.3 KB||Download|
|Lift System Instructions||225.2 KB||Download|
|Zero Rate Add-A-Leaf Instructions||351.8 KB||Download|
|Sway Bar Disconnect Instructions||242.7 KB||Download|
|Shackle Flip Instructions||206.3 KB||Download|
|Extended Front Shock Mount Instructions||204.4 KB||Download|
|Greasable Rear Bushing Instructions||419.9 KB||Download|
|HD Front Shackle Instructions||279.7 KB||Download|
|Bolt In Steering Box Brace Instructions||325.6 KB||Download|
|Axle Offset Plate Instructions||1.1 MB||Download|