It is realy very simple to repair. You have a piece of stress proof steel, or machine steel, machined to a 6" long x .495 piece, (the machinist should measure the oiling hole in the center of the cam) with a 1/4" hole through the center. It will be press fit into the existing oil journal inside the cam. Drill a 3/16" hole at both ends about an inch in from the ends, perpendicular to the sleave, ( make sure these holes are not in a lobe or oil journal). Install a spring pin, and epoxy the ends to keep the oil from comming out of the spring pins instead of the oil journal. When drilling the holes for the spring pins, try to just catch the wall of the stress proof insert. do not go directly through the center, as oil flow has alredy been decreased.