[packrat5]

That idea of making a tool could work, it depends how tight those bushings are. But I think standard thread stock may not be sturdy enough for the job. Also being that you live in a rust free area, the bushings may come out easier.
And this might be the time to do those king pins as well.
We have a 48 F-1 that needs all this stuff, I have everything, but don't want to tackle it in my driveway, if I can avoid it. So still trying to find a suitable place to work.