Hi scott well a 58 starchief would be the catalina which is the concave back wings and double headlight? well they are a good car and there are a few about at least, maybe the steering hits the sump as the steering box has a tendancy to brake off the mounts so could just be loose, not sure on how much it would be worth as they vary a lot and also depends how much some one is willing to give, but i would say as a barn find prob upto about 2k, if the engine has been changed chances are it not a pontiac engine as all v8 pontiac engines are the same size externally, its only the internals that differ, unless they have put a racing sump on which is bigger at the bottom, the body work is not realy an issue as the metal is realy thick, the only bad places are the front foot wells base of door pillar and around the bottom part of the front and rear windows, poss rocker panels if been sitting about, if you need any more info or some one to check it out let me know be willing to help if needed, the value when finished on the road could be upto 15 to 18k
pete,