Once everything is installed the alignment shop should be first on the order of business. A technical sheet of alignment instructions from Global West comes with these control arms. Bring the instructions with you for reference when the car is aligned. You will notice less pitch when rounding corners and reduced bump steer. This '57 will also steer a lot straighter on the highway. What's not to love about that? As for the stock stamped arms, save 'em or sell 'em at the next Super Chevy show swap meet.