Question about 1969 Barracuda

Not sure if the 3:23 SG was an option because I think Ma MoPar threw in some 3:23 peg legs under these cars, but 3:55 SG and 3:91 SG were optional.
Awesome! Thanks a lot. Now to decide whether I stick with the 8 3/4 or spend the money to build a Dana 60