1969 Dart GT weight
I know this will not help entirely.
Me 67 dart convertible 273 no AC, no PB no PS, automatic, weighed in at 3565, I'm pushing 275, had 1/2 tank, and maybe 50 lbs of stuff in the trunk.
3565-275=3290
3290-50=3240
This is pretty close to the advertised curb weight
3177 = curb weight per (
1967 Dodge (USA) Dart GT-GTS Convertible full range specs)
1969 383 4 speed, not your requested 440 etc but pretty close.
3329 = 383 4bbl, 4 speed. (
1969 Dodge (USA) Dart GT-GTS 2-Door Hardtop full range specs)
The body style will make a difference, so a specific would be helpfull