Mike,
It is very simple to get to work. Call Enzo at Finishline and have him send you the correct Lucas wiper switch. Make sure to remind him to send the wiring hook up instructions. (very simple in its presentation) and there you have it. life will be good for you just like in one of those "all natural male enhancement" comercials.
The Lucas switch is a unique animal that is designed specifically for that motor. It is an "on-on-on" type switch that is internally jumpered. Just trying to find an "on-on-on" switch that you could modify to do the job is difficult, so don't bother. Just use the correct Lucas switch.
Steve