[DeTomaso] '74 Taillight Lens

[John Taphorn]

Presently, I am restoring a '74 Pantera.  Upon separation of the rear 
taillight lens from their Carello buckets, I noticed that the lenses 
were held to the bucket by a screw with "wood" style threads.  I assumed 
a PO, or their mechanic, had swapped from the proper 4mm x .70 bolt in 
an act of laziness.  However, when I inspect the threaded hole in the 
bucket carefully, it does not appear to have ever been threaded for the 
4mm.  I attempted to chase on of the bucket holes with a proper tap and 
the tap was not welcomed so I didn't push it.

My '73 Carellos are machine threaded.  Any insights as to whether the 
factory made a thread change or are my Carello buckets buggered beyond 
recognition.  Fortunately, not beyond help.

Thanks
JT