You should have no trouble with that color choice. Almost all A & B body 68 Mopars were that color green (especially performance models and convertibles). If I find a suitable 68 Mopar thats NOT green, I feel like I've won the lottery. I have two 68 Barracuda convertibles and a 68 Charger RT that were that color from the factory. I really dislike that color and really hate that its so hard to find a decent 68 that isn't that color. My Charger is now red. One of my Barracuda convertibles is now surf turquoise, and the other Barracuda will eventually be painted blue. For years I wouldn't even look at green cars. Eventually I realized I was missing out on alot of otherwise great cars while few other color 68's would turn up. Now I look at the green ones as blank canvases that can be improved by repainting any other factory color. Except for green, my preference is to maintain factory original colors.
On a side note, I remember how thrilled a buddy was several years ago when he found and bought a 68 383 Dart GTS that wasn't green. When he went into the DVM to register it, the clerk looked as his paperwork and said, "'68 Dodge Dart? That's one of those ugly green cars isn't it?"