marty....don't forget....you need to put a clamp on the gas hose where it connects at the pingle valve......the pingle outlet barb size is smaller than the stock petcock.
We used to use an old trick - find a piece of flexible line, about the same size as the "gas hose", about 1/4" to 1/2" long. With a little oil and elbow grease, you can slide it over the gas hose, the last 1/2". It squeezes down the gas line, for a tight fit on the nipple, but allows you to remove it fairly easy with a stiff pull, without needing any tools.
R