my honest opinion, if its a look thing, push the wheels out with spacers, then stretch some tyres over them, and camber the bitch with some adj uppers.
personally i probably wouldnt have an issue with taking that much out of a UCA, especially if u reinforce it in other ways. those front UCA's are f**king tough, the LCA, cross member, castor rods/bracket, tie rods, will all generally break before ur UCA's