67-69 Barracuda differences

just curious. hopefully some of you plymouth buffs can tell me. what are the differences between 67-69 barracudas appearance wise? just curious because i wabnt to, in the future(distant future) buy and build one. i like the 68 Barracuda S but honestly i dont know the real deifference.

also, how many here prefer notchback, or fastback? i love both personally and would purchase either one if given an opportunity

thanks!

Some other differences not mentioned are:
Front fender scripts are at the front of the fender in 67-69 and at the rear on 68.
Doors are slightly different between 67 and 68 on the inside. The wing window levers are different. And of course the 68 was the only model with the lower dash pad. Gas tank straps are suppose to be different.