If you've got the K-member, make sure it came with bolts for the P/s rack.
Other than that, get the A-arms. You can use stock struts, you just have to take the "cup" off 'em(I just drilled the spot welds off). You can buy a coil-over kit from anyone(UPR, etc), just make sure it comes with springs and the the threaded sleave that goes over the strut(should also come with a spanner wrench and two nuts for the sleave). Remember when choosing a spring rate that the softer you go, the better it is for drag racing. I run 200# springs on my DOHC motor, but for your GT (if you're drag racing) you could go to a 150# or a 175# w/ no problems.
Remember that QA-1 sells struts that already have a threaded sleave so you may want to look into those, you'll just have to get a spring.
Currently I have QA-1 springs with a UPR coil over kit.