Yep, that's right. You just need to make sure that you get the carb with the black plastic insulator around th neck, which is used on the Picco EVO 3 series.

A friend of mine turned down the neck of his Nova carb and made a Teflon insulator. Works great too, but involves a lathe.

Last suggestion is an OS carb, which has an insulator but the diameter is bigger than Nova and Picco. It can be turned down on a lathe as well to fit the Nova crank case.