Better yet, go to fourwheeler.com and type red sled into the search bar and read all the things they did to there 1991 Chevy. And they still broke everything. And I don't think they had to try too hard. Mind you they probably weren't easy on it, but still... At one point they said "The truck is practically allergic to dirt"
Not to get you discouraged but keep in mind that most kits are bolt on suspension drops. Any thing to make it stronger is big money unfortunately. That's why most people dump it for a solid axle.
However if yours is two wheel drive, there are a few bolt on kits that can take a good beating.
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Yeah, they tried to do a "front dig" and since they had upgraded most everything else, the front differential aluminum casing grenaded.
A front dig is when you pop it into low range front drive only, stand on the brakes and lock the rear wheels, then the front tires claw and drag you in a tighter circle than you could turn with steering when on the rocks or trail.
A cast iron center section may survive that, but they were beggin' for problems and they knew it.
They did pop a lot of other stuff, but what do you expect when you take a left for dead 94 ECLB 2500 and shove it over big rock and sink it in gooey mud?
You know it's going to pop. You just know it is.
The Sled never got a fair chance IMHO. When something popped, they fixed it and then something else would pop because the previous thing wasn't the weak link anymore. It's a process and you have to follow it. Even solid trucks pop things when you push them. You fix it to be stronger and look for the next thing to pop.
They also started with a junkyard dog of a truck. Abused and forgotten, it had been left to die. Way too big and way too long for what they intended to use it for.
Then they drag it out of a back lot, throw a new 454 in it and expect it not to break things. Doesn't work that way. If you start with an old forgotten rig, you have a lot of work to do to bring it up to ***** before you start throwing kit at it. Like I said, they chucked a lift kit and a new 454 at it and were surprised when it popped CV axles. Duh....
Then they started throwing even more weight on it in huge bumpers, tire carriers and assorted other heavy bits like winches.
I was a fan of The Sled, it's too bad it ended up the way it did. Like I said, I didn't think it got a fair shake. They said they were hell bent on building an IFS rig, but it never really seemed that way. It always felt like "awww, do we really have to do and IFS build" and "gawd, is there any way we can spend less money on this thing?" Not something you can do when you are "trailblazing" a serious build no one else has tried.
It never would have been on the same level as a solid front axle, but they gave up too early if you ask me. It just turned into another nail in the IFS coffin. To turn insult to injury (for the IFS project) they ended up torching the IFS off and swung a solid under it.
End of the story at that point.....