Lots of apples to oranges comparisons about the weight. Yeah my '67 Satellite weighs 3,600 pounds but that's not an early '70s Charger either.

I still say it is closer to 4,000 pounds than 3,600 pounds but there's only one way to find out which wouldn't be a bad idea so the OP knows what he's dealing with and if his ET is really off or not.

I did find this in the archives:

"My '71 Charger is 3,850, and that is with the A/C removed and aluminum heads, intake, and waterpump housing. Best way to find out is to just weigh it."