Got Some Cash, What To Do?

Well I got a nice bonus at work + an awesome check.

So I have around $600 to spend on the stang.
Not sure what to spend it on though...

I might go with suspension things, like Coil Overs for the front and tubular A arms.

Power wise Im pretty happy with it.

EDIT:

Here is a list of all the things on my car.

Mods...
Engine:
-Stock 302
-C&L 76mm MAF
-MAC 1 3/4" Shorty Headers (ceramic)
-MAC O/R H Pipe
-Flowmaster 2 Chamber CatBack
-70mm TB
-FRP Cobra Intake Manifold

Drivetrain:
-Stock World Class T5 Trans
-Steeda TriAx shifter
-FRP Aluminum Driveshaft
-Moser 31 Spline Axles
-Auburn Pro Locker
-FRP 4.10 gears

Electronics:
-MSD 6AL
-MSD SS Coil
-FRP 9mm Wires
-MSD Cap/Rotor
-AutoMeter Gauges
-Battery Relocation

Suspension and Chassis:
-Excessive Motorsports Subframe Connectors
-Steeda Sport Springs
-Tokico Shocks
-Pro3i Weight Jackers
-FRP Upper Control Arms
-Maximum Motorsports CC Plates
-99 GT Front Brakes
-Stailness Steel Brake Lines
-Hawk HPS Pads
-ARP Wheel Studs

Interior and Exterior:
-04 Cobra Seats
-CCP Gauge Plate and Radio Pannel
-50Resto Clear Headlight Kit
-Kaneen 3" Cowl Hood

Well the motor that is in the car wont be getting heads or a cam.

I have another motor in my basement that will be getting all the good stuff. And I have a nice interest savings account for that.

So besides engine stuff what would you guys do?