Why take a chance on dropping it into the pan? Just pull the pan, just so happens, a classic Stang is probably the easiest car to do this on. As for reinstalling the pan, get a one piece Felpro oilpan gasket , it's the easiest gasket to use in reinstalling a pan in the car. And one more tip, get a set of pan rail stiffeners from an 80's- up 5.0, these along with the felpro gasket will insure you'll have no leaks when you're done.