Street 351W: 500 CFM too much?

You can add an electric choke or buy any Holley with it already installed. The carb's the same either way, sort of a modular system. You can swap one or the other from any other Holley or at least from any 4150-4160-2300 series and some others. I personally ditch either choke. Most electrics are trouble and I also don't need or like to add the manual pull cable to the vehicle, but I live in a warm climate. If you want a Holley with an electric choke, buy a maunal carb and I'll send you a box of the electrics I've removed.