So if I put on I-beam brackets would I need to get Radius brackets also?
You should, otherwise you screw up your caster. I don't know if it could be fixed enough by alignment bushings. Here is some info about bushings given to me by BlackBII;
"
Here are some part numbers for a Dana 35.
Ingalls #594, Moog #K8986, Specialty Products #24180, and Spicer # 6122025
If you have a Dana 28, they will be different. RockAuto.com has them, and you can get them at Napa, Checker, Autozone..etc "
I also saw in a recent thread radius arm bushings that had an offset hole that would help, and maybe with the alignment bushings, could do away with the rad arm drop brackets. But I don't have enough knowledge to say for sure.
I was lucky enough to score an '87 stx highrider and took the factory drop brackets and pitman arm to put on my racetruck. You may be lucky in finding one, I got mine before I knew what a highrider was, and scored it for a case of beer
Edit; I just realized you are working with a 2wd, I don't know if the 4x4 stuff will work for you. Hopefully someone with more knowledge will chime in.
Good luck,
Richard