If your 43/4 wheel fits snug on the axle flange center , you can redrill very accurately with just a drill press. drive out the old studs, measure center distance between holes,and mark a line. Lay on the rim,and using a large bit to fit in the lug hole,drill down just enough to establish a center on all 5 holes. measure your new studs,select proper bit, drill,drive. Hank