So I was working on my Blazer all day. Its my daily driver and its been running rough recently. So I end up switching out my plugs after messing with my ignition, distributer and carb all day. I get half of them swapped out at 10 ish and then all of a sudden two of the plugs refuse to thread, I dont have thread chasers, and now she is out of service until I get my next day off. OR I bite the bullet and have a shop chase the threads and finish the job. Ugh, its days like this I wish I had a beater and a garage.