Mods are in my sig...I have a bone stock suspension with a posi rear end and air bags in both springs...what I wanted to do was get that ATR rear sway bar, and boxed lower control arms...would I need anything else for a mid 11 second car??? I am also upgrading the slicks from 26x8.5x15's to 28x9x15's...should i be all set then? also who has the best lower control arms and what is the price expected...thanks