there is also AEM,(the one I have been looking at) and electromotive, as well as the megasquirt, they would all work. There is probably several more. you could probably get away with 3 injectors, and fire them twice as often, since RPM is so low on these engines. But I don't know that to be a fact. It would depend a lot on the injector itself I would think. Either way it is extremely possible. And if you go with the aftermarket controller, the spark/timing control is already in the box as well. (well usually, you have to make sure the controller you look at has it, but most of them have a full complement of engine management tools.)
