[FC] tool question

[N2VZD at aol.com]

well i got a nice thread by grinding the nose of the tap down just a touch 
more. it grabbed right away then  and worked good. i stopped when it got to 
threads and relubed it.  looks good and insert seems to be  in there to stay ..   
i hope.  i cut a small line in the threads with the dremel to make it grab 
better.  used thread locker also. so thats done fer now. these heads looked like 
junk when i started but the real condition of valves , guides , and seats is 
amazing. i did have to clean serious corrossion and remove several broken bolts 
but they all came out ok with heat and dremel slots cut in them for a 
screwdriver.
thanks for replys!
regards, tim colson