Those A-100's can be rather light. I had mine made by that infamous Gent that never delivered to anyone else but me. Lucky strike I guess.LOL. They were 20 lbs without the brackets. The mounting hardware for bracket to seat and bracket to floor are also unobtanium. Some of my seat belt latch brackets are getting a closer unobtanium look as we speak. Seatbelt mounting bolts were professionally made out of the exotic metal by Trick Titanium as a test. They look totally stock but only saved an 1/8 of a pound. Thanks to the heavens that I did not pay for those. LOL. The B-pillar post covers in the interior are a bit porky for their size. Real thin gauge Aluminum copies can make the cut because there is no structural importance other than visual. If I make another set, I'll send you a pair. I did not fool with the roof cross rail because of structural.
Sun visors and hardware can set you back 3 Lbs. Interior Dome light 3/4 lb. Down underneath, throw that galvanized transmission convertor inspection cover in the gutter, more cooling air for the Convertor and if you must run it, make it out of Aluminum.