Those stupid chrome covers and oil pans are almost impossible to seal... Pound in the crank seal and it slips right out. I would get your self a O.E. cover and possibly oil pan. Unless you want it to look good there then i would get one of those Cloyes hex-adust timing cover. made out of alum. and i never had a leak problem.
BJuice said that YELLOW SNOT.. that stuffs works awesome. The only gripe is cleaning the old gasket off. Use it all the time at the shop. Pan gaskets in the vehicle put some on hold the gasket in place for 30 secs. and its on for life.