If you're looking for a lowbuck lowering method here's what I did on my 48 Dodge rat rod and it worked great. Remove the lower control arm and cut the spring mounting plate off of the top of it. It's just held on with a few rivets. There's a brace on the bottom of the arm, cut this off, too. Trim the edge of the spring mount bracket so that it can be relocated to the bottom of the control arm and will sit flush. Weld into place. I attached the lower spindle to it while I was doing it to keep everything straight. It worked perfect and gave me a 2 inch drop. I also cut 1 coil out of my springs to give me another inch, but not necessary. Here's a before and after shot of the control arm (after on the left), and a shot of some brackets I made to relocate the top shock mount. You dont have to do this part but the ride is many times better if you do. 1967-72 Chevy truck front shocks worked really good.