<VV> Extracting the inserts:

[Cliff Tibbitts]

This may have been covered before.  How many times have you heard that?
Anyway, I mentioned last week pulling about 1/2 of the threads out along
with my spark plug.  I won't go into all the details, but I suspect that
there was already an insert in place.  I did search the archives, as well as
the forum over at Corvair Center.  

Here is my question.  I have the Time-Serts kit from Clark's.  If in fact
there is an insert already in the head, does anyone have a suggestion for
removing the old insert, without destroying the head?  

Thanks in advance. 
Cliff Tibbitts
Lexington, KY