You don't HAVE to swap out the shocks/struts, but many people do it all at once to save on labor. From what I've heard most people that just go the spring route eventually get tired of the stock shocks/struts and change them. I'm waiting to do it all at once.
The ford racing springs im looking at are a 1.25" drop. I'm just wondering because if I need the C/C plates I want to get them at the same time. I really don't want to tear up my tires over a couple hundred dollar part that would have saved them from wearing out. Thanks for all your help it is appreciated.