Hi i hope someone can help me, i am trying to get my son's 94 ranger together for him. It has is a 2wd xlt extended cab 94 version with a 7.5 ring gear. My problem is the rear diff cover rotted out so i replaced it (tough finding one but i did a chrome one) now i can't get the fill plug out. In what order should i try, drilling a hole in cover an welding a nut on the inside to create a rear fill plug, drilling original plug out an attempting an ez out, welding a nut to orig plug an trying to turn it out that way. I have mapp'd gas, PB rust buster, mystery oil, still it defys me. Any help greatly appreciated.