Well if your looking at the so called "Race Kit" from Excessive Motorsports .....
DON'T ORDER ANYTHING FROM THOSE RIP OFF'S. Check their BBB rating..it sucks.
Get the stock kit from Summit and a aftermarket cam, and if you have a decent suspension and a car that hooks you can get into the 11's as long as you can drive. I was able to get my full weight GT into the 12.60's @ 108mph with the complete kit, non-emissions cam.
After a cam change

AFM-N-61

and a swap to 30# injectors and a 76mm C&L I was able to get the car into the 11's w/ my NA 302. With the correct gear to match this cam I hope to be in the 11.40's or quicker next year. I have went 114.9MPH with this combo and the 3:73's, with a swap to the 4:30's we are looking for 117mph+