May be a dumb question, but without a body manual or a lift, I hope someone can answer prior to me tackling seat belt replacement. Re: standard lap belts on 68 convertible: Does the outer belt with retractor bolt into a fixed/welded nut in floor/frame or is there a free bolt that I need to find somewhere under car (I can not feel one or get my hand anywhere near where I think it might be)? In other words can I do the replacement all from the interior or do I have to get under car and possibly remove something to access nut? Then does the inside belt do the same or is there a nut in the tranny tunnel that I have to access from under the car? Any pictures from a body manual would be greatly appreciated. Thanks