My /6 '74 is listed on the reggie at around 2700.
MOPE, depending on equipment and how filled he was, AKA gasoline and trunk parts, I think it is a bit high, but not unreasonable. The big bumpers are heavy along with added door braces and possible equipment over yours.
The A/C units, in total are heavy. Do you supose buckets weigh more?
I'm hopin my Duster didn't gain to much with the 318 thrown in it. I did put on headers, aluminum intake and carb. Lost the fan in favor of the electric fan.