BomberBear
It would lead to more performance and also if you are stable at your present FSB you should be just as stable because the 1/5 divider would kick in and keep the PCI and AGP at the speed you have them now. The settings you will definately have to use are Normal and 266, the rest you will just have to see for yourself, but if you set to least aggressive then try increasing one at a time you will soon find your optimum.
Synchronous means that the speed of the buss's will be the same for the CPU and the DDR there fore no bottleneck, ie if the FSB is set to 182 your CPU will be 2x182=364 and your DDR will be exactly the same. At the moment you have CPU 2X147=294 and DDR is 2x(FSB+PCI)= 2x(147+36)=366 so you can see that there is a bottleneck with the CPU.
Hope you understand, but if you have any further questions just ask, I will do my best to answer.
Hood