I did the conversion a few weeks ago. My car did not require the brake line adapters. I bought 99 Blazer 2-wd front brakes lines from O'Reily's and they worked perfect. I did not notice the front wheels sticking out any further but I did change springs and installed tubular upper controls arms at the same time. The car definitely stops better. If you are only changing the spindles then the job should only take you about 2 or 3 hours. I spent about 8 hours on mine but I rebuilt the entire front end; lowering springs, shocks, bushings, cleaned and repainted, etc.. Good thing about the Blazer spindles is you can adapt Corvette C5 brakes if you want even bigger brakes.