I read in an old issue of Hot Rod that the factory made 50 65 Barracuda's with 8.75 rears for Stock class racing.

I have never seen one nor have I seen any documentation to back that up.

The 7.25 is fine for street use. I drove and bracket raced my Barracuda with the small rear with nary a problem. Of course, I think the reason for its survival was the lack of tire grip allowed the spider gears to live.