The stock stator plate is slotted and has all of the timing adjustment that one would ever need.  Be careful playing with the timing.  I have never seen a good running engine that needed more than one to two degrees advance. 

Most of my modified engine packages run std timing plus or minus 1/2 deg.  The shape of the combustion chamber determines what timing is optimum on a given engine package.

yea, like motorgeek said be careful.  Advancing the timing just a little will cause crazy kickback.  My foot has turned black and blue and it felt like it was broken.  Saw it happen to a guy one time and he was on crutches for a week after.