Pipes out and at my welding shop. One came out nice and easy, one not so much. I broke the nipple off the pipe for the hose running to the head. Is this a standard brass nipple or something special? For the manifold to pipe gasket I plan to get new ones, but not sure about the copper ring on the big end. Can the ring be reused or do I get that as well? Who is the best place to order from?