Does the lower Universal Joint attach with a cinch bolt engaging the steering box input spline shaft groove like the stock Universal joint or does it use a set screw with jam nut?

• What is the length of this lower shaft? fitment
• What size and thread pitch are the internal hex head set screws? I lost one and need to to the size. fitment
• What diameter and spline does this fit? I am unsure if my box is factory or not and dont want to order without knowing fitment