Hi,
This appears to be an inhouse Ford fix.When you think about it the block could not be machined without it(the pad)in place.It is used to hold the bare block to the mill table on all 4 corners.It is also quite typical to use a nickle alloy based rod to arc weld cast iron.As stated by Bob-this is not a listed "repairable"area of block repair by Ford in any service manual.The reason is a "repair" is necessary to reseal porosity/cracks,which cause external leaks,in/on a completed engine.These pads were/are only needed for the initial machining of a rough casting,after this process is completed,any machine work can be accomplished and is usually done off of the main bearing bore,not useing these bosses.These damaged and repaired blocks must have passed all other inspection points,and been finished,then put into service/production---that would be the only way to get the final stamp on this part.If any original machine work is/was out of tolerable limits,it will show up as abnormal bearing wear.Hope this adds some insight.
P.D.
PS. Had a good friend watch one of the last 427 side oiler blocks get dropped on the loading dock,which broke off the starter ear.He had to wait for another to be located,as they would not sell him a damaged part,and there were no others made.That was in the 80's and we wonder what they did with the broken one??