Im going to replace the front springs on my 78 GMC truck 454 (smittybuilt bumper) I want either the 2" hd or 3" hd, but Im not sure if they will sag much. I may in the future add a winch, but that's a ways off. So, do these springs sag much, (meaning if I want a 2" lift get the 3" springs??) I asked a couple local shops about ordering the Tuff country springs, and they both immediately tried to sell me another brand, and wouldnt order the TC's. Can someone recommend a reasonably priced source in So Cal??