Originally Posted by TejanoTrackie

Actually, you'll just make the problem worse. Since the wheel axle sits ahead of the fork crown due to positive rake, the highest part of the tire is ahead of the fork crown. Spacing the caliper out will actually bring it closer to the tire. The only real solution in this case is to get a Keirin front brake kit, which clamps to the fork legs, and permits the caliper to be raised. Another thing the OP can try is to enlarge the bolt hole in the front of the fork crown vertically to tilt the brake caliper upwards.