Looking for any documentation '69 Barracuda Fastback

From what I've read the 741 case being weaker compared to 742 and 489 is bs. I checked thru 69 parts manual looking for diff #'s and couldn't find anything definitive. I think rear has been swapped from 489 to 741 in my opinion.
I can measure my swaybar from my 69 when I get home?
Hey Steve is your barracuda a performance package car?