If you go buy the Edmunds/NADA guides the engine/trans/options make a bigger difference than whether its a Cuda or Barracuda. That said, Cudas are no doubt worth more money to a lot of folks but based on the reaction my 73 Barracuda gets whenever I drive it most people could care less. If you're going to resell it, it matters. If not, I really don't think it matters as much as most people think. I was going to 'clone' a Cuda, but quickly realized my Barracuda with sport hood, stripes, lots of options, etc. was just as cool.
Later, Jim