What size do you guys think I should go with? I'm planning on using 2x4, but what thickness? 1/4, 5/16, or 3/8? This will be used to extend the front of the framerails on my S-Dime and to fab a crossmember between these new front frame rails and probably one back around where the front of the leaf springs mount(for traction bar and future 4 link mounting). I'm leaning towards 3/8 since this will be the mounting location for my front leaf springs and possible rear 4 link.