ok so i have a three inch lift but the rear is a inch taller so i wanted to level it out so i was going to add a 3/4 spacer but i heard i f you go above 3 1/2 inch lift you cant get enough caster which i was told was 7 degrees positive without new control arms???????

 

so your question is???????

 

Depending on how much adjustment you have for your CA's You could still use stock arms, altho not recommended. I will have some WJ LCA's available soon, when I put my new(er) aftermarket LCA's in.
They have some surface rust, but nothing some sanding and some spray paint can not fix. Busings already trimmed to run on an XJ.