\'74 factory shoulder belts? This is my very first post! Last weekend I bought a '74 Blazer for camping and moderate 4 wheeling. But my wife and I feel very vulnerable strapped in with only lap belts. My dad tells me there are attachment points in the fiberglass top for shoulder belts. The holes, if that's what they are, appear to be covered with some kind of caps. Is this what I'm seeing? If so, how do you take them off? Does this mean shoulder belts were an option in 1974? Can you still get them anywhere, or should I look for aftermarket ones?