727 transmission pan bolts

All steel pans need "body work" to seal right. I have a chunk of iron l place the pan edge on and l use a special hammer l ground to a convex shape, almost like a ball peen hammer; to tap each hole back down actually below level in order to pre-stress every attaching point. Then l only use the duraprene red fiber gasket. I use no sealer or adhesive. They never leak.