My buddie has a tow business in the midwest and every time it snows or rains /almost always it was some shackeled car all jacked up in the back ,down in the ditch.They really like to hydro plane ,in the rear with air shocks and shackles.If your doing these bigger tires for traction,thats all out the window when you raise the rear end and put all the down force and weight to the front tires,untill you get the front way up on launch from drag shocks or pull the front up in the air from hp,you will have less traction untill that point.If your at this point I would suggest tubbin it and this can be done with alot of work and little money or alot of money and little work.The logic behind tubbin is just what I described ,all jacked up in the back and no weight transfer and handling issues as I described.Tires all tubbed and hidden under the back scream performance,air shocks and shackles scream inexsperiance.Two exact cars and one is shackled and air shocked to the moon,the other tubbed and still sittin at ride height,the tubbed normal car will be faster and handle much better.Once you jack it up in the back the handling gets down right terrible compared to a normal or tubbed car.