Well, that was a waste of time, sorry fishy, but summit was incorrect when they told me the one piece gasket would fit my 340. Their website is also incorrect, because it says that SCE gasket will fit a 340, but it is only for the magnum engines. I called SCE and asked them, and they said they make ones for the 360 and the magnum. I let summit know of their error. So, there is currently no one piece oil pan gasket available for the 340. I was left to buy the milodon crush proof 4 piece gasket, we'll see how that works.