I just recently weighed my 69 Barracuda hood, which is very close in size to the 72 Dart hood. It weighs 55.2 pounds. So, as long as the packaging is less than ~45 pounds, you will be OK.

Bob

AAR 4-speed 3.91, Tor-Red;
70 440 6 pack Roadrunner 4-speed 3.54, Plum Crazy;
68 Formula S conv 383 4-speed 3.23, Electric Blue;
69 Barracuda conv Slant 6 OD4 2.94, 71 B5 Blue;
78 Lil' Red Truck, Red;
70 Challenger S/E. 505 6 pack, Passon 5-speed, 3.55, B7 Blue