A Duron 1300 will be a Morgan core. My understanding is that the Morgan core has the same problem with the early revisions of the KT7A as the XP CPU.
The bottom line is that it may work, it may not. I think most people with the early revisions (1.0 to 1.2) have been successfull in running XP CPU's on their motherboards. But a few out there have not been able to get them to work at all.
I'm one of the lucky ones, I have an XP 1600 Palomino that works fine in my KT7A 1.1.