The driver's door of the '73 I have access to just has a blue paper tag that states -
"MFD. BY HESS & EISENHARDT CO., 10-73, This vehicle conforms to all applicable federal motor vehicle safety standards in effect on the date of manufacture shown above. Vehicle Identification No. ***** "
There is a faint outline of another paper tag, about 2 inches square, but it is long gone.
The only mention of weight that I have seen in any of my cars, is the aluminum foil tag on the inner fender, the lower half of which says -
"Tire Inflation Pressure, (Check with tires cool), Professional Cap, Standard Inflation Pressure for all loads, including full rated load
*9 Passengers + 200 Lb Load (1550 Lb. Total)
Front 24 p.s.i. Rear 40 p.s.i.
Tire Size 8.60-15 - 8 Ply Rating
* Front - 3 Rear - 6"
I tried to take pictures, but they didn't turn out well, as it was dark when I got home, and the lighting is not the best in my garage. I can check the '76s this weekend, but as I remember, they all were the same.