11 sec. build cost?

After helping a friends dad build a vega for the strip I began wanting to start my own race project. I already have a 73 swinger with a 360 that has all the standard bolt ons like rpm intake, 650 carb, headers, cam, converter, and 8 1/4 with 3.55's. I really do not want to cut up my dart and turn it into a race car just because I have had it since I was 15. What would be the cost of building a new car that would run 11's? I am thinking a small block would be the easiest way to go but I wouldn't mind having a big block. Minus say 2000 for the cost of the car.