For that model, according to briggs you will need a 395491 coil if you want to bypass points (it includes magnetron EI) or 298316 to keep points.
They also list 397358 magnetron coil suits it, which is more commonly available.
It is available aftermarket as GA spares ECP5079. Unfortunately not the same as the 3.5hp motor as Norm mentioned and unfortunately a quantum won't fit either apparently
