Ladder bar w/floater or Caltracs

I guess for all practical & econmonical purposes I will be going to a ladder bar & housing floater, but still using the adjustable shocks in the rear & using the S/S springs to support the load. Here is a question though, the car currently will pull the front tires anywhere from 3in to alittle over a foot upon launch.
I have been told to keep the car from dragging the bumper wheely bars would be necessary, Is this true or does it have some validity or is it just not true, also i have read & been told when installing the ladder bars to make absolutly sure the lower bar is installed perfectly parrallel to the ground?