I found these drawings on another forum and thought they would be helpful to someone here.
The stud holes would be drilled to match the diameter of the studs that are installed and the locating hole for the new bolt pattern could be any convenient size that matches the pilot drill or transfer punch that you choose to use.
The stud holes would be drilled to match the diameter of the studs that are installed and the locating hole for the new bolt pattern could be any convenient size that matches the pilot drill or transfer punch that you choose to use.