It was basically a full day's worth of work to get them all out. Two of them came out just with the pressure from a left hand drill bit. One of them came out with a fair amount of persuasion from the extractor. And the last one fought me like a female dog from hell.
I had started soaking them with Kroil, twice a day, starting last Thursday. I used soft acetylene and wax. I spent the better part of an hour trying to convince that last one to let go, and then the extractor broke off in it.
:flamemad:
I went at it with the welder at that point, but the extractor didn't help any and my welding effort just snapped off.
At that point I was ready to give up. I called a mobile EDM guy to see if he could fit me in his day. It was going to be $275, but I figured it was worth it rather than messing up the head.
And then a friend dropped by and talked me into attacking it again. We went at it with a carbide burr to try to get the rest of the extractor out (some of it came along with the first welding effort) and then I made a second attempt at welding onto the broken bolt. It still fought, but it finally let go:
I got it all back together this evening, and dayum, I have throttle response! And at least thirty pounds of boost.
What a novel concept.
Next step is to hook up the trailer and see how it compares to the 8.1L.