Ok,what I did was change the exciter end to a sa250 ac end by splitting and putting on a sa200 mounting end with a A-3 rotor. Then this makes the machine have to be turned 900/1800 RPM for the exciter to work right. Then I added Ark Force coils for 1800-RPM so the ocb's will be correct.Had to build a SS end to cover the exciter end. It took some thing and time on all of this and do the wireing for it to work.Has SS hood,all guages,bells & whistles. BUT it can be done and it works like a champ. Welds real smooth. Hope tis is enough info. Thanks-JP