I just bought a 5 lug conversion kit for my '88 and it comes with cobra brakes. Should I replace all of the fuel lines? I found a kit on http://www.calmuscleparts.com/store/MUSTANG-BRAKE-LINE-KITS-1993-Cobra-P24285C2982.aspx for $133. but then I did another search and found some for $80 bucks on maximummotorsports.com. what is the difference between the two?