Global West Suspension manufactures Lower Control Arms for A-body cars (Chevelle, GTO, Corvette, Buick, Lemans, Buick GS, 442, EL Camino, Monte Carlo, Cutlass) model years--1964,1965, 1966, 1967, 1968, 1969, 1970, 1971, and 1972.
Coilover lowers will not support using a standard coil spring. QA-1, Viking, Afco, and other shock brands will fit with no problems.
There are no modifications to the frame. The spring is conical and installs in the frame just like the factory unit.
The shock sets on top of the control arm rather than bolting from the bottom. Global West arms use double plates for supporting the load around the shock area.
All the TLC control arms are pre-assembled with special bushings that allow the arm to fall as the front end rises.
Note: No sway bar attachment is provided on drag race control arms.