Pickup Front Suspension Upgrades/Altering?

I have a housing here from a truck . The rear was under the springs 1971 1/2 ton 2 wheel drive. I would check you may find its under the springs. My friend Greg just lowered a 86 ram doing just what I mentioned. That is how I knew about the Van control arms.
Just checked my 87 2wd & rear axle IS under the springs. OOOOPPS!