15x8"wheels w/4.5" backspacing, LBP

In search of a pair of 15x8" wheels , large bolt pattern, with 4 1/2" backspacing. I am kinda looking for steel wheels - any style, standard, Rally, Police but would consider alloy wheels if they are in decent condition. Going on the back of a stock fenderwell 65 Barracuda for weekend use. In a straight line. The car has an 8.75 rear and stock location springs. Could be fun, but if I have too much fun, I will need subframe connectors as well. Thanks! Cheech14/ Art (RT).