I seriously doubt that's going to work for you. The electric fan in question already isn't enough to cool the car at low speed while in combination with the mechanical fan. And as a puller even an electric fan needs a shroud.
Nothing wrong with going to an electric fan, there are plenty out there that will do the job. But none of the ones I can think of that will work as a standalone will fit in a 2" space either.
You'd be far better off losing the electric fan and adding a proper shroud for the mechanical fan.
