727 driving me crazy with leaks!

I never could get a 727 to stop leaking , and i had a shi& load of these , always from the pan , every car i had same thing .Leaks when it starts to cool down , dry it off go for a drive about 1 hour , come home dry as a new one, come out next morning pan all wet and leak marks on ground .Right now on my Dart i have a regular deep pan , with a drain using a new reusable gasket from Mopar and black weatherstrip adhesive , and you know it is not to bad now , you name it i tried it. But mine is definitely every car i had from the pan only .