Regular gasoline cars run fine on unleaded gas, so no conversion kit was needed. But you are right in being skeptical - it wouldn't make sense to convert a gas powered car to electric. You wouldn't just swap a combustion engine for a electric engine. You'd need to change everything - engine, transmission, gas tank, air conditioning, dash/info center. And then you'd want energy recovery, so you'd change out braking systems. Best case is you'd end up with a heavy, expensive, inefficient, poorly balanced electric car.