How do you measure for what size is needed autozone was no help ? im guessing inner diam of rear brake hub ?

 

Your 4x4 has 10" drums.

 

I did my '03 rear brakes last fall. Autozone or whatever parts store has the new spring kits, brake self adjusters, etc. They are pretty cheap so might as well pick those up and replace them while you have it apart for the brake shoes. I picked up a set of brake spring pliers and the shoe spring tool also for not alot of $. Makes the job easier.