Which side is the SAI out of spec on? out of spec SAI usually indicates a bent spindle. Is SAI the same on both sides? If the included angle and SAI are the same on both sides, let her rip. It's in the machine or how the heads were hooked up. No way in hell will both spindles be bent exactly the same amount. Also, you want positive caster for the street. .5 degree is pretty low. If that's about all you can get, you might get them to put in a little more toe in to make up for some high speed stability.
