An implant and method for insertion between adjacent vertebral members. The implant comprises an implant body with a base section having a plurality of base extensions, and an end cap adapted for selective axial positioning at a selected point on the base section. The end cap comprises locking, variable slot and flexing apertures configured to receive corresponding base extensions, and a variable aperture slot extending through the end cap which is adapted to enable the end cap to resiliently contract as the end cap is positioned on the base section. The locking apertures and flexing apertures will prevent rotational movement of the end cap relative to the base section once the end cap is secured to the base section. The implant imparts end cap height and angulation to an adjacent vertebral body at the selected or desired point when the implant is positioned in the intervertebral space.
