I'm completely rebuilding the front suspension in my 57 Corvette and I started on the drivers side . The kingpin won't budge . I removed the caps , retaining clips and the center pin. Tried to hammer it out with a steel rod and put it in my press . It won't budge . I am understanding from what I have read that it is a slip fit and should slide out fairly easy . Years ago I used to change a lot of kingpins on the old trucks and never had any problems but they weren't over 60 years old at the time . Should I be using some heat on them or will it damage something ?