if the rings are not hurt you should be able to reuse them after opening, enlarging them, the end gap on both the top rings and the middle rings
How much boost and what type of fuel are you going to use?
I like a lot wider end gap than the minimums, IE 4.350 bore size. top ring .020 to .024 and on the second, middle rings I shoot for between .024 to .030 on N/A motors non both gasoline and E85