Make The Right Kind Of PowerThe basic laws of physics tell us that to get a car moving off the line takes torque, and the heavier the car, the more torque your engine needs to make for quick acceleration. In the world of Mopars, most B-bodies are second only to C-bodies in terms of sheer weight, so when it comes to making power, this factor needs to be considered. Building an engine that makes torque, especially at low rpm, is paramount to getting a heavy car moving; so the right engine and the right combination of parts are both mandatory. Of course, the easiest way to make torque is to increase displacement, so if your car came with a 318 you should consider a swap to a 360 or a stroked 360. And if your B-body is powered by a small displacement big-block, consider upgrading to a 440 or even a stroked 440 for more torque. Additionally, engine upgrades to your B-body should be geared toward improving low and mid-range torque instead of peak horsepower. This means if you plan to install headers, smaller primary tubes will generally work better. And for that intake manifold swap, dual-planes generally make better torque at lower rpm than single-planes will. The same theory can be applied to camshaft selection. If your car is heavy, pick a cam that makes good low rpm and midrange power to get your heavy B-body moving more quickly.
Get The Torque To The PavementSince spinning tires are counterproductive to rapid acceleration, the B-body has an advantage to smaller, lighter cars. That's right, while our B-bodies may be a little heavier than the A- or E-body Mopars, much of that additional weight is over the rear tires. Additionally, most B-bodies can accommodate a much larger rear tire without modifications like moving leaf springs inboard, or cutting fenderwells. When we build our B-bodies we try to exploit these advantages by installing large tires and suspension parts that will enhance our car's traction.