The flow isn't the problem, it's when the pump stops working that's the problem. Your car will still cross state lines. It's not like it's going to shut off and die. You will have warning signs. Any pump you change to will not run the car any better. If you increase the pump too much you will actually run the flow too fast and have an adverse affect. If you had the larger ic than the increased flow of a johnson would bring you back to normal. Otherwise the stock flow is fine, just the pump motor is what is the problem. That clear it up? Will the johnson pump last longer? No one knows. Has anyone left one sitting in the sun for 2 years then installed it to see how long it works? Montana is inferring the johnson is a better product, it may be. No one has had one on long enough to prove otherwise. It's up to you, if you are leaving your car stock and don't want to splice any wires or hoses, brackets, clamps then just replace with a stock one or see how long it lasts.