We built these adjustable struts to properly locate the LCA (lower control arm). If you are running urethane or nylon LCA bushings and urethane strut bushings your strut length is now more critical to insure the LCA doesn't slip back or forward on the pivot pin. Otherwise, your LCA inner pivot will be " floating," so the front-end alignment (toe setting) will not stay put. We recommend you preassemble your LCA / Strut assembly and sweep it up and down to make sure everything moves smoothly and the LCA inner pivot stays pulled up snug in position against the LCA pin shoulder, then assemble the rest of the suspension.
*FITS: 1960-1972 B-body & 1970-1974 E-body