want to go with steel wheels that fit dogdish caps

Ok. The 408 is in and it screams, but since this is a stock 4door grandma sleeper I want to go back to my stock 14 inch wheels up front and my factory, red line dog dish caps. I have them. In the rear it would be nice to go with a 15 inch wheel in an 8 inch wide pattern that the dogdish will fit on cause i'm going to run Nitto street slicks. I don't want to tub the car. I believe the forum has said i'll need a 15x8 with 4.5 inch backspace to fit the stock wheel well. Correct? I still have the factory drum brakes with the small 5 bolt pattern and would like to stay that way. If I have to change, will a different drum with a 4 1/2 bolt pattern fit my brake shoes?
Any ideas? I will paint the wheels green to match the car.
Thanks much. almost done!!!