15X8 w 4.75 backspacing

8 3/4? 5x4.5” or 5x4” axles?

If it’s an A body 8 3/4 with BBP axles then yes. If it’s an A-body 8 3/4 with SBP axles you may need some spacers to keep the tires off the springs, depending on what you decide to run for tires.