My 73 "BH" Barracuda was ordered with the Sport Hood, White Side Stripes, etc. that the Cuda normally came with. I'm not 100% sure, but one external difference I believe identifies the Barracuda from the Cuda is that the Barracuda could not be ordered with the rear valence cut-outs and instead had exhaust that vented below the plain rear valence panel. On my hood, there are Barracuda emblems on the side of each scoop vs the "Cuda 340" emblem on 340 Cudas. Not sure what 318 Cudas would have had..
Later, Jim