I stopped by a local recycler and weighed my 1968 Barracuda convertible with a newly installed injected, aluminum-headed 408"-stroked 5.9 Magnum, automatic overdrive w/ lock-up converter, A/C, 4 wheel disc w/ big bolt pattern wheels, 8 3/4 rearend and a full tank of gas + spare.
The first scale I drove on showed the car at 3750lbs. In disbelief, I drove over to a second scale which showed it at 3700lbs. Both the above weights are without driver or passengers.
I had assumed it was in the 3000lbs range, but was shocked to see the weight penalties of all my modifications. The car was originally a slant 6 powered ride that didn't go, stop or corner well. As heavy as it is now, the car is quick, fast, handles, stops, corners great and rides smooth.