I'm not questioning anybodies weights but it does make me wonder how similar cars as mine weigh so much lighter with less light weight parts. I just weighed my car on individual intercomp wheel scales that had just come back from being certified.

71 Dart 3240 pounds w/out me.
383 w/ iron heads, 727 and 8 3/4 rear.
8 point roll bar
Full interior, bucket seats front & rear bench.
Aluminum radiator.
Late model starter.
Light weight alternator.
Fiberglass front bumper and hood.
Wilwood brake calipers.
Heater core removed.
Light weight wheels & tires.
Fuel cell.