Windage tray

Just got my new 440 in yesterday runs great buy the oil pan is leaking between the timing chain cover and the pan (doesn't have a gasket between the pan and block just sealer). I am going to pull the pan tonight and clean everything up and put a new gasket in. It currently has a windage tray and I got the motor with the oil pan on so I have no idea how the windage tray attaches. Can someone give me some insight does it bolt on between the pan and block? Do I need 2 oil pan gaskets. Just wondering what to expect when I drop the pan and how many gaskets I need.