Like NZ is hitting on, it depends upon how "correct" you want to be.
If that's not a big deal, I do like the 70 R/T stripe but I would do one maybe in a sort of "non-conventional color" combo than what is normally seen. The light blue in the above pick does look nice but you'll have to remove the R/T emblems won't you?
Body side moulding it ok but not as sporty looking. Sometimes it makes the car a little "stodgy" looking, but it does add definition to the car and accentuates the bodyline a little more.
You might want to try doing mock mouldings by using some electrical tape on the car and see what it looks like.
Weird idea but it may give you a better idea. Body side mouldings are nice because they doo serve a purpose with door dings but I don't think you'll be bringing your car to the mall shopping anytime soon... I have them on my car. Sometimes I wish I didn't have them but they are a little different and they are factory ones.