Z-71 WHEELS ON A MAZDA B-SERIES

IT'S MY FIRST MAZDAWG AND I'VE GOT A SET OF Z-71 WHEELS. I KNOW I'VE GOT TO BORE OUT THE CENTER HUB BUT I DONT KNOW BY HOW MUCH.CAN ANY ONE HELP ME OUT.IT'S A DUMB POST BUT I AM REALLY LOST.