Is studying Jow Gar Kung Fu and Judo together good for self defence?

These are good qualities to have when it comes to self defence, however if you want it to be effective on the street you need to make sure that they would work well with each other in a self defence situation. For example make sure they you can perform effective self defence techniques in the clothes and shoes that you wearing in public, as well as to be confident that both your styles can flow together at the right time for example block, punch then followed by a throw and then potential ground work. Also keep in mind the kind of moves you would use in a self defence situation, something simple, not to many and easy to remember even under the state of surprise.