69 Barracuda 340 versus 340-s...

Alright Mopar numbers gurus and white book owners, I am just wondreing what the key differences are between the two? Am I looking at badging, tail panel and the fender tag? Would it be listed as A53 if it was a 340-s? Are there other key differences? Just trying to get a handle on this specfic to the 1969 Barracudas. I am basing this upon the information provided here:

http://www.plymouthbarracuda.net/information/1969-barracuda-production.shtml

I have fender tag info, but I am hesitant about posting it. I will provide via PM if necessary, just drop me a line.

Given the differences between 67-69, I just need to know what I am looking for/at. I am confused due to the car having things that I think it should, but there are things that I think are missing.

Thanks, and I appreciate the assistance as always.