I have a 74 c10 stepside with a hanger and shackle kit that gave me a 4" drop in the rear. Upon sitting the cross sills in their position to bolt the bed to frame I notice the cross sill closest to the tail gate sits dead on the rear shackles. I never heard of this before now. Is this common? I don't want to ruin my new wooden floor. I still want my 4" drop because I have 4" in front and I have a nice rake look. Hopefully someone can help me out. Thanks