I bought a used bo-laws belt driven fuel pump (older style) from someone. It was a alcohol pump so it had way to much pressure with its lowest setting. I called bo-laws, talked with bo and he had me send it in and they drilled, tapped, and put a fitting on for a return line to make it usable for me with no charge. I had bought 2 - 4150 carbs in the past from them, but they went above and beyond for me on the fuel pump.
Anthony