If you're gonna try to run a tap to clean the buggered threads, I would suggest trying to run the tap from the inside out. That way you have the good threads to guide the tap and clean the buggered ones true. If it is only the first couple as you claim, you might end up OK.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.