Low or high 12's probably with a supercharger. If you stick with headers, 4:10 gears, high flow cats, pulleys. You might get the low 13. The above performance has been done to my car ( minus the pulleys), and I was able to get a whole 6 more hp!

Do not listen to these ads in books, get 20 + more hp! Yeah right, do the mod, get your car dyno and you will fine out the truth. It will not be much with the above upgrades. You will be really disappointed!
You will be able to get more hp & torque out of the 02 with minor upgrades then I have because of my car being so old. There are no such thing as cheap upgrades in my opinion, people will disagree with my statement. But by the time you spend $100 bucks here and $100 bucks there. you have $1500.00 in cheap upgrades that are not worth crap until you hook that supercharger up. Then you will see those cheap upgrades being utilized!
Building the car, no....not worth it. By the time you with high performance heads, cams, rebuild, etc, not unless you do most of the work. You will have just as much invested in it as much as a supercharger, just find out your will be
ALMOST were a supercharger will have you!

Plus, the supercharger will not increase the gas mileage as much as building the crap out of it!
Good luck,
Rich