Max Perf. Street says +3.5-4* Caster. Not 4-5*
If you want 4-5* you're not going to be able to achieve the related camber, (neg 2-3) I don't believe, with offset bushings alone.
What are your specs now?
I would get the offset bushings and keep your camber bolts if they're in good shape, otherwise they are relatively cheap. And shoot for max Perf street specs.