Your plan should begin with suspension and braking because all else is moot in terms of safety and performance without these elements. When you're planning for power, opt for five-leaf mid-eye springs, heavy-duty shackles, urethane/polyurethane bushings, gas shocks, and invisible traction devices such as Shelby traction bars. How you outfit your suspension also depends on how you intend to drive the car. A suspension that's too stiff will jar your teeth. One that's too soft won't provide sufficient handling.