[66Submarine]

I really doubt you have 1/2 ton suspension if your truck came as a 3/4 and still has the correct axles.

3/4 ton trucks had coil springs and trailing arms just like the 1/2 tons, if that's what you mean. From what I've seen, it takes quite a bit of weight to squash the 3/4 ton coil setup (unlike the 1/2 tons).