kerscher ball joint alternative?

[721302]

could the ball joint hole in the 944 spindle be welded up and redrilled for the smaller 1303 ball joint? this is just a guess as i have never seen a 1303 ball joint up close to see how it fits to the spindle. My uncle is a very good machinest so he would be doing the work for me. it seems if this is possable it would make 944 swaps easier because stock balljoints could be used which are easier to come by than ordering from overseas.