I put a new HB on my 4.6L 2v engine. I used an impact gun to zip the bolt out. Then I just used an Autozone 16.99 HB puller. When I reinstalled it, I just GENTLY tapped the new HB on the end of teh crank and then put the bolt in, gently squeezing the trigger on the impact gun. The bolt touches the HB and keeps it square with the crank, so you don't damage anything. I put a touch of antiseeze on the bolt....not a gob, just a touch.