Go buy two small tubes or one large tube of Silicone marked as "adhesive sealant," not the other gasket maker kind Use it sparingly, not a bunch, between the block and the first gasket after you use it to seal the two oil pan gaskest onto the windage tray first and then between the bottom gasket and the oil pan at the same time as you put it on the block Follow the directions on the tube to the letter, it will insure a weep free seal IHTHs
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Use it sparingly, not a bunch, between the block and the first gasket after you use it to seal the two oil pan gaskest onto the windage tray first and then between the bottom gasket and the oil pan at the same time as you put it on the block 
Follow the directions on the tube to the letter, it will insure a weep free seal 