Rim size

Hey guys,
I've got a 1973 Dart Swinger with 14" rims. I've got American Racing Outlaw II rims on it and want to move up to 15" rims. Because I can't afford to buy all four rims at once and the tires I want to buy 15s for the rear and get some for the front later. Will a 15x7 rim with 5-4.5 bolt pattern and a 4 inch or less back spacing fit? Thanks for any help! What tire sizes fit? Thanks again!!