The front coil-over kits for the 1982-1992 GM F-Body Camaro and Firebird will work with the factory a-arms or any of our tubular a-arms. The coil-over kit mounts over the strut that is mounted to the spindle, therefore the a-arm has no effect on installing the coil over kit.
If you have purchased our tubular a-arms with spring boxes for factory type springs you can still later on run the coil-over set up. The tubular a-arms we make that are a "coil-over version" have the spring seat for factory style springs eliminated for further weight savings, that is the only difference.