I owned a 1959 Dodge Coronet 326 C.I.V8 Powerflyte 2 door hardtop also, no way it was as light as the later B bodies where I'm thinking that car was nearer to 4000 Lbs. empty than nearer to 3500 Lbs.
My brother had a 1957 Plymouth Savoy four door with a 301 wideblock 2 speed auto. We took it to a scale, it weighed 3530 no driver...
The dodge is a bigger car. 4 more inches of wheelbase.
526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!