You might have something that will go down the track doing it that way but you probably won't win much if any. There is development that goes into these cars just like any other car. GMS and Walbern both have multiple titles and many wins. With a rail stiffness of the chassis is very important. You want it to bow slightly when you hit the power then level out. The bow helps keep the front wheels on the ground and also like a real dragster gets it moving faster. You can run pretty much anything in bracket class but once you step up to top fuel, pro mod or funny car its a whole different deal. Most of the guys you find in drag racing have done all the other forms of racing as well. Many of them are very experienced with modifying motors and such. If you never win at all you will still learn a lot about getting the performance out of a motor and chassis. It all looks so simple from the spectator's point of view but when you are actually racing its not such an easy deal. The Walbern door slammer chassis has several ways to build it. Solid bottom plate 2 piece bottom plate aluminum and carbon or straight carbon for instance. Engine in the regular place or moved forward. Unless you have a prepared track to run them on they are pretty much useless. In a parking lot forget it. They will just spin the rear wheels. And since you have practically no suspension it needs to be smooth and pebble free. This one has a Walbern 2 piece chassis OS .18 TZ modified motor and RSP '41 willys body.
The kits aren't totally complete like you are used too. Some of the stuff has to be constructed by the builder. Servo mounting for the steering servo. Linkage for the steering. Fuel tank mount and tank.
And this little number is my top fuel car.
And my funny car which is electric and based on a GMS chassis.
The willys pro mod is the only 1:10 scale dragster to ever grace the pages of Hot Rod magazine.