For 4X4 trucks and Ramchargers from 1972-1993 with leaf spring front suspension. This bracket comes with 9/16″ mounting holes for the majority of Trucks. If yours is the early years with 1/2″ holes you will need to drill out your frame holes to 9/16″ and replace with 9/16 bolts, this is for the 3 holes joining the bracket to the frame. The Autofab bracket captures the 15 degree mounting angle of the steering box also. Unit comes with 4 high grade allen head bolts to secure the steering box to the new bracket.