Two part question .1) I am useing a J-Tec pitt style muffler for the first time . It dose not have a pressure valve? So I tapped a hole, and put one in for back pressure .Is this ok ?

2) Never used a "Sullivan " or "Graet Planes " Fule plug for a cowl. Its shows two fule connections , one to the tank the other to the engine .Dose the tank connection go to the line with the clunk atachment ? I am assuming that the engine will then pull fule thru this mechanisum and into the engine