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​That's odd.

Sorry, Joseph, I've never tried finding any. But if I did, my first call would be to a friend at a GM dealership. If he couldn't locate any NOS, I'd try having a set made. If I were in need of "better" springs and had more time, I'd take a try at re-arching them myself. Or, I could buy a very...

Joseph, I hope you realize that by putting those 3/4-ton springs on a 1-ton, you give up 700 lbs. of capacity in the front. If you never carry any loads to speak of, that could help ride quality. Or if you only use bumper pull trailers, which transfer load off of the front axle, they may also...

Well, at least the plate agrees with the official GM data - which is most likely where those numbers came from.

Uh, oh. Now we've entered the world between GVW and GAWR.

But if the springs weren't rated at 4,500 lbs., then the front wouldn't be rated at 4,500, would it? It seems to me that it's the weakest link the determines the weight rating. For example, if I installed 3/4-ton springs on my 1008, it would no longer have a 4,500 lb. rating, even though the...

Ain't that the truth.

You and me both. But I'm posting this photo so that I won't have to go look again, just to be sure. Or Google it again. Now all I have to do is find this post the next time the front load capacity comes up, which seems to be often.

Well, since there are two springs holding the front up, per spring that takes it down to 2,250. Just going by the data plates on the CUCVs I have, and the official GM numbers.

I should stay out of these spring topics. Last time I got the K-10 and K-30 mixed up, this time the spring rate and load capacity. If I look it up again I'll probably goof up again, but according to my notes the K-30 has a 4,500-lb. load capacity in the front.

Springs with a 4,501 lb./in. rating would give you just a little over stock.