1965 Barracuda- Restomod
I have never heard of an 8 1/4 with small bolt pattern.
To my understanding:
7 1/4 smallest axle, available all through the A body run, primarlily small bolt pattern, but possible in later A bodies if /6 and discs
8 3/4 strongest axle, available 67-72 area, ALL small bolt pattern
8 1/4 big bolt pattern only 73-76.
Since it came from a 65, and small bolt pattern, I am wagering that it is a 7.25?