Now here's the clincher, in 65' the cars like the one below get a little shorter on the body thus bringing in the curb weight at 3600+ Lbs with full interior and low block.
Now mind you, the sleeker more stylish Hardtops in either of these years are heavier by 25-45 lbs from all the bracing and gussets involved to keep it tight especially the narrowing C pillar types.