if you are going with a 4in suspension lift, yes you will need new shocks. Your going to gain 4in, which your stock shocks will not be able to cover. The body lift has nothing to do with shock length. As far as cranking your keys, I wouldn't worry about it. I ran my truck cranked with stock shocks for years with no problems.
EDIT...also your only lift kit options are 4in from superlift if this is for your 00. So your kit comes with shocks anyway.
Last edited by RangerNVS; 01-10-2010 at 08:37 AM.