On my 68 Dart running 73 A-body disc rotors and drag skinnys it was a nightmare driveing in the rain. It had sheilds on it.

The rotors were exposed to the airstream to aid cooling,I cut and added a piece of exhast tube to the lower center of the sheild, 3" long with 45* slash cut to direct air to the rotor for more cooling.

It looked cool from the front cause you could see the tire/rotor/sheild,but water/rain was the problem when driveing.

When running the cop rims it never had that problem in the rain and they never had any brake fade or overheating. I even upgraded to the 11.75" brakes with 11x2.5 on the rear.That made for killer stoping power but not in the rain.

IMO. I would keep them and add the cooling duct if over heating is a problem with a stock width rim. Running drag skinnys I would avoid driveing in the rain as much as I could.