There was a time when the best you could do with your chassis would be to swap out to better bushings or maybe perform some race car trick like the Gulstrand mod to mess with the suspension geometry a bit. Then tubular control arms hit the market with the promise of even greater changes to the suspension geometry of our classics. Why? Well, even classic cars like SS Camaros, AAR ’Cudas, and Shelby G.T. 350 Mustangs weren’t designed to handle at the levels we expect from performance cars today; they were built as fun, fast (for their day) transportation. Aftermarket bolt-on parts certainly helped, but they were still constrained by the designs of their chassis and subframes.
Stock chassis like the one shown here weren’t designed to hold up to the huge horsepower common these days and the stamped steel tends to twist out of shape when hit with heavy torque loads or hard lateral g-forces. Again, bolt-on suspension parts help, as do frame-stiffening devices and welded reinforcement gussets, but there’s a better way: a replacement chassis or subframe. To answer the question of why going this route might
