We take a stock oil pan, and sandblast it to clean it off and give it a nice uniform finish.  Then we mill a sectin of it flat near the top of the oil pan, for optimum placement of the oil drain fitting.  Then we drill a hole and weld on a -10AN fitting in this location.  The location we've selected does not impede the operation or fitment of any f the stock systems including AC Compressor, starter location, or wiring.  Please note this modification will eliminate the oil filter drain tray on 95-99 Monte Carlo and Luminas.