A "drag car" in my opinion, is a car that has a full drag suspension setup, something made specifically for straight line runs. Usually requires chutes, roll cages, and in some cases some big as* slicks out back. I bought my car for handling, not really to run down the drag strip. Even though that is a lot of fun, and as far as the street thing goes, anyone that says they have never is a lier and a fool. Everyone has at one point in time. I have had my share of "spirited" driving on the streets. But i like my big brakes, and wouldn't give them up just to put some slicks on the car.
The other problem with slicks is fender/bumper clearances. not being able to turn makes it very hard at the end of the track and even the beginning.
As far as the axles go, if u have enough power, it wont matter if ur drag racing or not, if you lay into the power hard enough and shock the drivetrain bad enough, u can snap an axle on the street. the stage 5 axles from DSS are $1700. Many of us have either fun out of funds from the buildup of the motor or are saving to get them. Or just dont think they need them.
These contours obviously arent cheap or easy to build, but those of us who do it, have a passion for the car.
Robert