Power steering setup gives you worse lock as the rack is longer, therefore preventing u from gaininig the extra advantage of the longer arms on the power steering arms..... basicly shortens the arc
how ever i find power steering very good, this is becaus ei can run large amounts of castor, like +5 and it doenst make the steering really heavy... but i will admit with standard castor, power steering sucks as you have no feel at all and just feels gay to drive with...
i think s13 setup with power steer will be amazing, as i will have the extra lock and ill be able to chuck the steering wheel in any direction with easy.... and ill still be able to run lots of castor as im not using ae86 castor rods... but i do think my rack will shit it self due to the extra stress of castor and lock