Its not the size of the spring hanger its the welds on or lacking looks weak.top of the list will be add a steering box brace these trucks are known for cracking the frame around the steering box mount.
http://offroaddesign.com/index.htm has a bolt in one or if its cracked they have a weld in one.And if you never been to
http://diy4x.com/ they make a lot of stuff for that truck from a metal dash and roll cage to half doors.