Steering Universal U-Joint Coupler 13/16 -36 Spline GM Bryke Racing Steering U-Joint 13/16" - 36 Spline x 3/4" Smooth Fits GM Power Box Model 800 (77-Prior) and certain Chryslers Strong and precise with "no slop" Capable of 32 degrees of working angle Dimensions: Overall Length: 3-7/8" OD: 1-1/8" OD of U-Joint: 1-5/8" ID Spline: 13/16" ID Smooth: 3/4" Round Spline: 36 spline