Weighed my Barracuda's the other day
The coupe is pretty much stock with the exception of the 2" TTI headers abd 3" exhaust. I haven't done anything to lighten it up in fact that weight is with the spare.
The 340 car had a full tank of gas. It is a Fastback with stock manifolds, a 2-1/2" TTI system and both cars have automatics.