I was attempting to remove and either replace or rebuild my power steering cylinder and got it all removed except the part that goes through what I am guessing is the center link. I have tried everything and accidentally mushroomed the threads on the bolt but it still won't budge. Does anyone have any other ideas or do I need to buy a new center link? Thanks in advance for any assistance. BTW the car is a 1968 J code with a T-5.