You need to determine whether the CPU is a 200 Mhz FSB model, or 266 MHz FSB. My guess would be 200 MHz because (to the best of my knowledge) the 266 FSB was put into the 1.33 and 1.4 GHz Athlons not the 1.3's.
The CPU communicates with the motherboard and memory at twice the host clock speed. Therefore if your CPU supports 133 MHz host clock speed, it is referrded to as 266 Front Side Bus (FSB).
This is separate from the speed that the CPU operates at internally.
It stands to reason that a 1300 MHz CPU which communicates with the motherboard at 266 MHz is faster than a 1300 MHz CPU that communicates at 200 Mhz.
I think your setting will need to be Host clock = 100, multiplier = 13.