Stripped spark plug threads 75 Dart

Ford Triton Engine Insert Kit No. 39300 | VehicleServicePros.com
For Ford Triton engines. I think the plug threads are the same (size and pitch) Worth a try. Talk to a local shop or Ford dealer that has the tool or may be ask your local Mac Tool dealer as to who he sold the tool to locally. It might cost you a hundred or so but easier than taking the head off. The insert is a permanent fix.
tmm

I think the head will have to come off regardless. There is no way to get a drill in at that angle and it looks like whoever removed the plug did not do a very good job. It will most definately have to be redrilled with a larger hole and a correct angle and the only way to get that will be on a bench (at least from what I can see)