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Old May 24th, 2012, 08:32 PM   #1
bluecrew
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Can I swap lifts?

I have some Superlift 6" lift springs (front and rears), that I bought for my 1978 K20. I am eyeing up sliding them into a 1991 crew cab SRW 4x4 that I might aquire. I tried to search and look up the part numbers of the lift springs for each truck and compare them, but of course the internet hates me...

Concerns I have:
+ load of the 1 ton squeezing the paint off the 3/4 ton springs,


Are there any other factors I might be forgetting?
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Old May 24th, 2012, 10:20 PM   #2
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a 91 doesnt have leafs in the front.
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Old May 25th, 2012, 04:56 AM   #3
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Quote:
Originally Posted by BlzrNick View Post
a 91 doesnt have leafs in the front.
Yes it does. Suburbans and 1 tons kept it through 91.
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Old May 25th, 2012, 10:29 AM   #4
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Quote:
Originally Posted by bluecrew View Post
I have some Superlift 6" lift springs (front and rears), that I bought for my 1978 K20. I am eyeing up sliding them into a 1991 crew cab SRW 4x4 that I might aquire. I tried to search and look up the part numbers of the lift springs for each truck and compare them, but of course the internet hates me...

Concerns I have:
+ load of the 1 ton squeezing the paint off the 3/4 ton springs,


Are there any other factors I might be forgetting?
Front springs are the same, u-bolts are different. Rears may be 52" or 56" and rear axle may be larger, requiring different u-bolts.

Steering arm is different, 1-ton uses a drop drag link instead of raised arm.

Shocks are same
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Old May 29th, 2012, 09:11 PM   #5
bluecrew
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Yeah, I have 52" rear springs in my garage, but the v3500 has 56" rears. Even if I had some 56" rears, from another lift kit, (1/2 or 3/4 ton) would they still hold up under the extra weight of a crew cab long box?

Is there actually a difference between the springs ordered for a 1/2, 3/4 or full one ton?
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Old May 30th, 2012, 09:02 PM   #6
bluecrew
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Turns out the front springs are not the same. The rear eye bolt diameter is smaller on the 1/2 and 3/4 ton springs. But the diameter of the V3500 One ton is the same as the front eye bolt. Also, the one ton has 3" wide front springs while the 3/4 ton springs I have are only 2.5" wide.

This takes the whole "maybe I can use some of my existing lift kit in my garage and use it on my new minivan" theory and blows it to shit.

I'm guessing now, I'm going to have just buy a full lift kit for my V3500.

Anyone have any suggestions? I'm looking for all springs, 6", no blocks, ever.
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