When I did the bar in my Dart I tucked the hoop right up against the headliner. The hoop angle follows the angle of the door/rear side glass joint. It too has Kirkey seats, I made aluminum brackets to work with sliders. Once I located the position I liked a bracket was fabbed to attach the seat back to the cross bar. With the factory shoulder/lap belt I don’t see how I could get in a position to bang my head on any of the bars and with the harness on I can’t see it at all.