UPDATE:
The taps that I ordered to clean up the buggered threads arrived yesterday and this morning, so i got to work and got the threads all cleaned up with the exception of the very front hole on both of the 12 FV's I got a while back. The taps worked great, but with the barrel threads at the bottom of the front holes, the taps did not really do much good on these holes since the taps had too much taper (even a bottom tap) to clean the threads up completely.

I was able to work the screws in and out with minor binding using cutting oil, and then cleaned them good, then mounted the one piece DNZ mounts and got all the screws snugged down. Should get the scope mounted this weekend and bore sighted, then off to the range. LOL

Thanks for all the help.