Magnum 500 Wheels for a 69 Roadrunner

Hi: I have a 1969 Roadrunner. It's a 383 4bbl car, matching drivetrain, not a #1 car, but pretty nice. At the moment it has 14' American Classic Wheels which are starting to show their age and I'd like to upgrade to something more traditional Mopar. I like the look of the Magnum 500's. I've seen Roadrunners with them and also with 15' wheels, which is where I'd like to go. I have 60 series tires now and would like to stay with that width if at all possible. The other issue is the brakes are drum in the rear, disc in the front. Will I need to do anything special to accommodate the 15' rim, and the fact there are two types of brakes?
Thanks for any advice!
Author: RonLiv