You have to use a diamond studded surfacing wheel and make about three passes just to get it flat and the hot spots out.
Next time I'm going to an aluminum flywheel.
Try a 3/8 npt tap (plumbing size). Looks like it is the right one. They are cheap and you can get them in a good hardware store. Should be $10.
If you can't get it to press the bushing out then you can thread a pipe fitting into it that you can grab with the puller.
Common Billy, this ain't that hard?
