Which ones are leaking exactly? I had leaks from the rear ones below the rear main seal. Either the threaded holes go through into oil or i fouled up the seal install somehow. My fix was to replace the studs with good bolts with large flange heads, and put some of those sealing washers (with the rubber bonded on the back of them) between the bolt and pan, and I put some right stuff on the threads. So far so good. Just make sure to get the surface as clean and free of oil as you can before installing.
The correct order would be block, right stuff, girdle, washer, nut, oil pan gasket, oil pan, nut. If that makes sense