1970 DUSTER WITH DISC BRAKE CONVERSION WHEEL HELP

HI YALL, just got a 70 Duster all original and I'm going to buy the Performance online disc brake conversion kit. As you're aware the disc brakes come with 5 x 4.5" lug pattern so i need to get new wheels. I'm looking at getting 15x 7 for the front and 15x 8 for the rear. I also am more than likely going to use ralley style wheel. Classic Industries are by me and they have a 15x7 wheel with 4 1/4" backspace and 15x8 with 4.5" backspace. Will these wheels work with my Duster and brake upgrade and what tires do you recommend? I dont want the tires rubbing or sticking out of the fender. Thanks