I have the SHO Strut Tower braces front and back, makes a big difference to the "feel" of the car both at street speed, but espescially on the track!!!
I just had a day of running laps at the local track up here (Mission Raceway), and combined with the BAT 22mm Rear sway bar and bushings (front and back)it honestly felt like a different car!! (Yes...that's a slight exaggeration), but you get the point.
Kinda wish I'd done one mod at a time and taken it to the track after each...all in all though, I would highly recommend strut braces!!!

99 SVT (Black) # 2642 of 2760
Mirko Racing Intake \K&N Filter (RU 3130)
BAT Air Inlet Pipe
HD Motor Mount Inserts \Front - Rear Sway Bar Bushings
BAT 22mm (Rear) Sway Bar, Bat Springs \ Koni Sport Struts
Performance Fords - Spherical Rod End Links (Rear)
Performance Fords - Street Link
SHO Shop Strut Tower Braces (Front and Back)
SHO Shop Body Sub Frame Connectors
Aeroquip Stainless Steel Brake lines (Front/Back)
Sho Shop "Y' Pipe
Magnecor Wires \ Bosch +4 plugs
Ford Dual Mass Crank Damper
Pillar Guage Pod
Perma-Cool Remote Oil filter Mount
Summit Racing Polished Almn Battery Relocation Kit
MSDS Headers (not installed)
B&M Short Shifter
Sparco Pedals (4 pedal set)
(I think I got 'em all)...someone sell me something else!!