The 03-04 Cobra had the best LCA's that ever came on a factory Mustang. Sites offer these for sale to replace 94-04 Mustang LX and GT LCA's. All the tubular stuff is garbage and will let you down in the future. MY friend has the whole tubular set up and you should go over bumps and railroad tracks...it feels like it is coming apart. I looked at it, greased it and there are no problems with it.
My tuner runs his Mach 1 into the high 9's and low 10's and he has all the stock front suspension.