AutoX, your 68 is nearly dead-on with my 67 coupe. My coupe weighs 3340 with a full tank of gas, but I have an aluminum intake, lightweight starter and manual steering, and that's 80 pounds right there. Certified scales at a truck stop. Didn't get a front/rear balance, though, as their computer printout wasn't working and the lady just wrote out the total weight.

67 Barracuda coupe, 360, 727, 8 3/4, A body 4-piston discs, 15" Cragar SS (7" front, 8" rear), manual steering and brakes, aluminum intake, 360 aluminum water pump, iron Indy LA-X heads, TTI headers/X-pipe exhaust.