You would use that procedure if you you were converting a throttle coupled spark advanced ignition system(T.C.S.A.) to a computer timing control ignition system(C.T.C.).

I may be wrong but I'm not aware of any Brillelli engines that used a T.C.S.A. ignition. Do you have linkage from the carb to a belcrank and ring that rotates back and forth around the front of the crankcase housing when the throttle is manipulated?