[BonzoHansen]

Define the conversation. Race car or street car? Replacing factory belts? Etc. This conversation did start with a 4th gen f-body, not a 54 Ford.

John, yea, a properly installed harness is better than no belts or lap belts. But for f-bodies I can now get quality, modern 3 points in every generation. Including good retrofit rear 3 points. Morris Classics and others. Anyone driving a 68 Camaro coupe with lap belts is a moron.

Kind of off topic, but despite what people do all the time a cage has no place in a street car. Watch that M3 wreck video for movement in an accident. Ok, let's use a harness, problem solved. Helmet? No helmet probably did not help the guy that wrecked that 74 in PA a few weeks ago.

Energy dissipation seems to be key in these things. If I’m wearing a harness the only thing still doing 65 is my head. OE seatbelts are designed to stretch. Harnesses by nature stretch a lot less, for good reason.

In the end, the assumption is 3 points is good so 5 is better is often false security. There is more to it than just belts.