Wm,
See Newbie thread "Next up: roll bars" for some push/pull I have done recently thinking about roll bars and how to integrate. There are two types: decorative and substantial. I would recomend against decorative for two reasons: as mentioned here, they will not help you in a tough spot. Rather, would do more harm than good most likely. You need something stiff in three dimensions secured positively to the frame through the shell, and there are a couple of preferred spots -- see pix in other thread. I believe they should be hooked in at four places, minimum, so the whole structure is properly braced side to side and fore-aft. I believe the bars should be padded to help w/ knocking your head in crash that does not roll you over. I like the idea of two humps, one behind each seat, vs. one large bar. When done right, you should be able to lift the entire car easily by hooking to the roll bar. Fastening a seat belt to them should be easy. Again, see other thread for several picturs of how different folks have tackled this idea. While rather radical, the Hoopty (Cory Drake) has a total solution to this problem. Also, view my posted pictures, where some details of doing the roll bar thing are shown.